| 22044 7 Corners | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22185 A T & T | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20607 Accokeek | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20525 Action | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 21710 Adamstown | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20783 Adelphi | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20787 Adelphi | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20544 Adm Office Us Court | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20575 Adv Comm Inter Govt Relation | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20186 Airlie | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20105 Aldie | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20598 Alexandria | 202 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22301 Alexandria | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22302 Alexandria | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22303 Alexandria | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22304 Alexandria | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22305 Alexandria | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22306 Alexandria | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22307 Alexandria | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22308 Alexandria | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22309 Alexandria | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22310 Alexandria | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22311 Alexandria | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22312 Alexandria | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22313 Alexandria | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22314 Alexandria | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22315 Alexandria | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22320 Alexandria | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22331 Alexandria | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22332 Alexandria | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22333 Alexandria | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22334 Alexandria | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20049 Amer Assc Retired Persons | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20106 Amissville | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22746 Amissville | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20373 Anacostia | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20373 Anacostia Anx | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20762 Andrews AFB | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20762 Andrews Air Force Base | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22003 Annandale | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20608 Aquasco | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20148 Arcola | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20785 Ardmore | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20598 Arlington | 202 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22201 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22202 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22203 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22204 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22205 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22206 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22207 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22209 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22210 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22211 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22212 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22213 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22214 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22215 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22216 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22217 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22219 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22222 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22225 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22226 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22227 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22230 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22240 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22241 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22242 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22243 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22244 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22245 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22246 Arlington | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20597 Armed Forces Inaugural Com | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20306 Armed Forces Inst Pathology | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20451 Arms Control and Disarm Agy | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20318 Army Criminal Invest | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22158 Army Times | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22159 Army Times | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20146 Ashburn | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20147 Ashburn | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20148 Ashburn | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20149 Ashburn | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20861 Ashton | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20906 Aspen Hill | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20916 Aspen Hill | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22244 Assistant Secretary of Navy | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22185 AT&T | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20781 Avondale | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20782 Avondale | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22041 Baileys Crossroads | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22041 Baileys Xrds | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 25410 Bakerton | 304 | Jefferson County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 20055 Bank of America | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22118 Bank of America | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20838 Barnesville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20610 Barstow | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22712 Bealeton | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20839 Beallsville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20611 Bel Alton | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22307 Belleview | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20704 Beltsville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20705 Beltsville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20612 Benedict | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22610 Bentonville | 540 | Warren County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22611 Berryville | 540 | Clarke County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20740 Berwyn | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20740 Berwyn Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20810 Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20811 Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20813 Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20814 Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20815 Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20816 Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20817 Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20824 Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20825 Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20827 Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20889 Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20892 Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20894 Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20710 Bladensburg | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20065 Blue Cross Group Hospital | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20135 Bluemont | 540 | Clarke County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20032 Bolling AFB | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20032 Bolling Air Force Bas | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22713 Boston | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20715 Bowie | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20716 Bowie | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20717 Bowie | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20718 Bowie | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20719 Bowie | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20720 Bowie | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20721 Bowie | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22620 Boyce | 540 | Clarke County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20841 Boyds | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21714 Braddock Heights | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20148 Brambleton | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22714 Brandy | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22714 Brandy Station | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20613 Brandywine | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20722 Brentwd | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20722 Brentwood | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20862 Brinklow | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20136 Bristow | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20077 BRM | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22158 BRM-Firm ZIP | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20137 Broad Run | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20237 Broadcasting Bd of Governors | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20148 Broadlands | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22430 Brooke | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20833 Brookeville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20615 Broomes Island | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22610 Browntown | 540 | Warren County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21716 Brunswick | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21758 Brunswick | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20616 Bryans Rd | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20616 Bryans Road | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20617 Bryantown | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21717 Buckeystown | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 25413 Bunker Hill | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 20372 Bur Medicine Surgery | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20228 Bureau Engav and Printing | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20214 Bureau Labor Statistics | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20533 Bureau Narc and Dngr Drugs | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20532 Bureau Narc Dngr Drugs Lab | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20233 Bureau of Census | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20245 Bureau of Indian Affairs | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20241 Bureau of Mines | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20534 Bureau of Prisons | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20239 Bureau of Public Debt | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22009 Burke | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22015 Burke | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21718 Burkittsville | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20866 Burtonsville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20277 Business Reply | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22095 Business Reply Mail | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20818 Cabin John | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20705 Calverton | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20138 Calverton | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22304 Cameron Station | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20746 Camp Springs | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20748 Camp Springs | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20731 Capitol Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20743 Capitol Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20753 Capitol Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20790 Capitol Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20791 Capitol Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20799 Capitol Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20790 Capitol Heights PO | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20731 Capitol Hgts | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20743 Capitol Hgts | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20790 Capitol Hgts | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20791 Capitol Hgts | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20799 Capitol Hgts | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20139 Casanova | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22701 Catalpa | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20143 Catharpin | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20064 Catholic University | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20119 Catlett | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20505 Central Intelligence Agency | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20120 Centreville | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20121 Centreville | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20122 Centreville | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20151 Chantilly | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20152 Chantilly | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20153 Chantilly | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 25414 Charles Town | 304 | Jefferson County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 20588 Cheltenham | 202 | Howard County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20623 Cheltenham | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 25427 Cherry Run | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 20732 Chesapeak Bch | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20732 Chesapeake Beach | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20781 Cheverly | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20784 Cheverly | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20785 Cheverly | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20813 Chevy Chase | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20815 Chevy Chase | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20825 Chevy Chase | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20350 Chief Naval Operation | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20782 Chillum | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20428 Civil Aeronautics Board | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20871 Clarksburg | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20124 Clifton | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20735 Clinton | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20904 Cloverly | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20625 Cobb Island | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20904 Colesville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20905 Colesville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20914 Colesville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21702 College Estates | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20740 College Park | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20741 College Park | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20742 College Park | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20722 Colmar Manor | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20588 Columbia | 202 | Howard County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20453 Comm Equal Oppor Armed Forc | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20425 Comm on Civil Rights | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20558 Comm Tech Uses Copyrights | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20581 Commodity Futures Trade | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22306 Community | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20219 Comptroller of Currency | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20842 Comus | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20207 Consumer Product Safety Comm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20722 Cottage City | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20442 Court of Military Appeals | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20047 Criterion Ins Co | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22202 Crystal City | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22701 Culpeper | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22735 Culpeper | 540 | Madison County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22448 Dahlgren | 540 | King George County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22193 Dale City | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22193 Dalecity | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20872 Damascus | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20678 Dares Beach | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20874 Darnestown | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20878 Darnestown | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20340 Defense Intelligence | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20144 Delaplane | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20646 Dentsville | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20520 Department of State | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20523 Department State International Div | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20251 Dept Agric Off Outside Hq | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20330 Dept Air Force Pentagon | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20588 Dept HS | 202 | Howard County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20598 Dept HS | 202 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20215 Dept Labor Payroll Audit Div | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20391 Dept Navy Fed Credit Union | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20380 Dept Navy Hq Marines Arl | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20390 Dept Navy Other Offices | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20250 Dept of Agriculture | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20310 Dept of Army Pentagon | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20230 Dept of Commerce | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22161 Dept of Commerce | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20235 Dept of Commerce Outside Hq | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20585 Dept of Energy | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20528 Dept of Homeland Security | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20240 Dept of Interior | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20530 Dept of Justice | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20210 Dept of Labor | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20213 Dept of Labor Manpower Admn | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22225 Dept of the Navy | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20590 Dept of Transportation | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20591 Dept of Transportation | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20227 Dept Treas Check Claims Div | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20226 Dept Treas Other Offices | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20855 Derwood | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20588 DHS | 202 | Howard County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20598 DHS | 202 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20842 Dickerson | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20511 Dir National Intelligence | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20221 District Director Irs | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20747 District Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20753 District Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22451 Dogue | 540 | King George County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21710 Doubs | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20629 Dowell | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20101 Dulles | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20102 Dulles | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20103 Dulles | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20104 Dulles | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20163 Dulles | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20166 Dulles | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20189 Dulles | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20102 Dulles Air Mail Facility | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20102 Dulles Air Transfer Office | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20041 Dulles International Airp | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20101 Dulles P & D Center | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22025 Dumfries | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22026 Dumfries | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20754 Dunkirk | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22027 Dunn Loring | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20781 Edmonston | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22718 Elkwood | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21727 Emmitsburg | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22082 Engineering Support Center | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22309 Engleside | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22401 Enon | 540 | Fredericksburg City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20460 Envir Protect Agency | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20507 Equal Emp Opportunity Comm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20506 Exec Office Other Organ | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20571 Export Import Bank | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20151 Fairfax | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20152 Fairfax | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20153 Fairfax | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20598 Fairfax | 202 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22030 Fairfax | 703/571 | Fairfax City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22031 Fairfax | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22032 Fairfax | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22033 Fairfax | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22034 Fairfax | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22035 Fairfax | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22036 Fairfax | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22037 Fairfax | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22038 Fairfax | 703/571 | Fairfax City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22039 Fairfax | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22035 Fairfax County Government | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22039 Fairfax Station | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20743 Fairmount Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20743 Fairmount Hgt | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 25419 Falling Waters | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 25419 Falling Wtrs | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 20598 Falls Church | 202 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22040 Falls Church | 703/571 | Falls Church City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22041 Falls Church | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22042 Falls Church | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22043 Falls Church | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22044 Falls Church | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22046 Falls Church | 703/571 | Falls Church City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22403 Falmouth | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22405 Falmouth | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22406 Falmouth | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22412 Falmouth | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20447 Family Support Administratio | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20578 Farm Credit Admin | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20632 Faulkner | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20535 FBI | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22135 FBI Academy | 703/571 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20537 FBI Identification Unit | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22226 FDIC | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20554 Fed Communications Comm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20472 Fed Emer Mngt Agency | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20424 Fed Labor Relations Auth | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20427 Fed Mediation and Concil Ser | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20409 Fed Records Center | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20553 Federal Aviation Agency | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20429 Federal Deposit Ins Corp | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20463 Federal Election Comm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20426 Federal Energy Reg Comm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20573 Federal Maritime Commission | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20551 Federal Reserve Board | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20580 Federal Trade Comm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20412 FHA Comptroller | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22156 Firm Zip | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22159 Firm Zip | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20437 Food and Drug Admin | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20579 Foreign Claims Settlement | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20745 Forest Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20747 Forestville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20753 Forestville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22060 Fort Belvoir | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21702 Fort Detrick | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20024 Fort L J McNair | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20024 Fort Lesley J McNair | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20024 Fort McNair | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20319 Fort McNair | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22211 Fort Myer | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20744 Fort Washington | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20749 Fort Washington | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20750 Fort Washington | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22310 Franconia | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22315 Franconia | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22401 Fred | 540 | Fredericksburg City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22402 Fred | 540 | Fredericksburg City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22403 Fred | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22404 Fred | 540 | Fredericksburg City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22405 Fred | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22406 Fred | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22407 Fred | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22408 Fred | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22406 Fredbg | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22407 Fredbg | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22408 Fredbg | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21701 Frederick | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21702 Frederick | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21703 Frederick | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21704 Frederick | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21705 Frederick | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21709 Frederick | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22406 Frederickbg | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22407 Frederickbg | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22408 Frederickbg | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22406 Frederickbur | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22407 Frederickbur | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22408 Frederickbur | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22405 Fredericksbg | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22406 Fredericksbg | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22407 Fredericksbg | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22408 Fredericksbg | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22401 Fredericksbrg | 540 | Fredericksburg City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22402 Fredericksbrg | 540 | Fredericksburg City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22403 Fredericksbrg | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22404 Fredericksbrg | 540 | Fredericksburg City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22405 Fredericksbrg | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22406 Fredericksbrg | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22407 Fredericksbrg | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22408 Fredericksbrg | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22412 Fredericksbrg | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22406 Fredericksbur | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22407 Fredericksbur | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22408 Fredericksbur | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22401 Fredericksburg | 540 | Fredericksburg City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22402 Fredericksburg | 540 | Fredericksburg City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22403 Fredericksburg | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22404 Fredericksburg | 540 | Fredericksburg City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22405 Fredericksburg | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22406 Fredericksburg | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22407 Fredericksburg | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22408 Fredericksburg | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22412 Fredericksburg | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20088 Friendship Heights | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22630 Front Royal | 540 | Warren County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22039 Fx Station | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20046 G E I C O | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20076 G E I C O | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20052 G W University | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20155 Gainesville | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20156 Gainesville | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20877 Gaithersburg | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20878 Gaithersburg | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20879 Gaithersburg | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20882 Gaithersburg | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20883 Gaithersburg | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20884 Gaithersburg | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20885 Gaithersburg | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20886 Gaithersburg | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20898 Gaithersburg | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20899 Gaithersburg | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22107 Gannett | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20896 Garrett Park | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22463 Garrisonville | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20810 Geico | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20811 Geico | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22412 Geico Insurance | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20405 Gen Services Admin | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20548 General Accounting Office | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20090 General Delivery | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20244 Geological Survey | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22320 George Mason | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22305 George Washington | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20057 Georgetown University | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20874 Germantown | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20875 Germantown | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20876 Germantown | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 25420 Gerrardstown | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 20812 Glen Echo | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20706 Glenarden | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20774 Glenarden | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 25421 Glengary | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 20906 Glenmont | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20769 Glenn Dale | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20771 Goddard Flight Center | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22720 Goldvein | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20401 Govt Printing Office | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20403 GPO Field Serv Div | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20404 GPO Procurement Div | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20402 GPO Supt of Documents | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 21788 Graceham | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22066 Great Falls | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20782 Green Meadow | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20768 Greenbelt | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20770 Greenbelt | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20771 Greenbelt | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22067 Greenway | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20469 GSA Consumer Products Info | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20406 GSA Crystal City | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20407 GSA Region 3 | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20468 GSA Surplus Sales | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20470 GSA-TCS | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 25423 Halltown | 304 | Jefferson County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 20158 Hamilton | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20159 Hamilton | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 25425 Harpers Ferry | 304 | Jefferson County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 22471 Hartwood | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20168 Haymarket | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20169 Haymarket | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22701 Haywood | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 25427 Hedgesville | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 20170 Herndon | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20171 Herndon | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20172 Herndon | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20190 Herndon | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20191 Herndon | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20192 Herndon | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20194 Herndon | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20195 Herndon | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20196 Herndon | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20598 Herndon | 202 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22095 Herndon | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22096 Herndon | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20204 Hew Food and Drug Admin | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20857 HHS | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20903 Hillandale | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20746 Hillcrest Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20748 Hillcrest Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20746 Hillcrest Hgts | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20132 Hillsboro | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20134 Hillsboro | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20714 Holland Point | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21701 Hood College | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20410 Housing and Urban Dev | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20413 Housing Assistance Adm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20059 Howard University | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20060 Howard University Hospital | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20411 Hud Fed Housing Adm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20414 Hud Fed National Mortgage | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20637 Hughesville | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22639 Hume | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20192 Hundon | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20196 Hundon | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20639 Huntingtown | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20871 Hyattstown | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20781 Hyattsville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20782 Hyattsville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20783 Hyattsville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20784 Hyattsville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20785 Hyattsville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20787 Hyattsville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20788 Hyattsville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21754 Ijamsville | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20539 Immig and Natural Records | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20536 Immig and Naturalization Ser | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20538 Immig and Naturalization Ser | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20640 Indian Head | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20104 Inspection Service Forensic | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20063 Int Group Plans Inc | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20441 Inter Amer Defense Board | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20577 Inter American Dev Bank | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20224 Internal Revenue Service | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20440 International Joint Comm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20431 International Monetary Fund | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20436 International Trade Comm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 25428 Inwood | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 20643 Ironsides | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20645 Issue | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21755 Jefferson | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22303 Jefferson Manor | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22303 Jefferson Mnr | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22724 Jeffersonton | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22481 Jersey | 540 | King George County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20566 John F Kennedy Center | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20318 Joint Staff | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 25427 Jones Springs | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 22034 Journal Newspaper | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22036 Journal Newspaper | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 25430 Kearneysville | 304 | Jefferson County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 20891 Kensington | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20895 Kensington | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20774 Kettering | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20775 Kettering | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22485 King George | 540 | King George County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22315 Kingstowne | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21716 Knoxville | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21758 Knoxville | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20646 La Plata | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20216 Labor Management Admin | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 21759 Ladiesburg | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22630 Lake Frederick | 540 | Warren County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21774 Lake Linganore | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22192 Lake Ridge | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20785 Landover | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20784 Landover Hills | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20784 Landover Hls | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20783 Langley Park | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20787 Langley Park | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20703 Lanham | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20706 Lanham | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20784 Lanham | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20703 Lanham Seabrook | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20706 Lanham Seabrook | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20176 Lansdowne | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20646 Laplata | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20774 Largo | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20792 Largo | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20707 Laurel | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20708 Laurel | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20709 Laurel | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20725 Laurel | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20726 Laurel | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20531 Law Enforce Assist Adm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20879 Laytonsville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20882 Laytonsville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20175 Leesburg | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20176 Leesburg | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20177 Leesburg | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20178 Leesburg | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20906 Leisure World | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20782 Lewisdale | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21701 Lewistown | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20557 Lib of Congress Licensing | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 21762 Libertytown | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20540 Library of Congress | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20541 Library of Congress Card Div | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20542 Library of Congress Handicap | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22726 Lignum | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20160 Lincoln | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22642 Linden | 540 | Warren County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20598 Lorton | 202 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22079 Lorton | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22199 Lorton | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20180 Lovettsville | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20176 Lucketts | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20657 Lusby | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22101 Maclean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22102 Maclean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22103 Maclean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20262 Mafic | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20108 Manassas | 703/571 | Manassas City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20109 Manassas | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20110 Manassas | 703/571 | Manassas City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20111 Manassas | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20112 Manassas | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20113 Manassas | 703/571 | Manassas Park City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20111 Manassas Park | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20658 Marbury | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20390 Marine Barrks | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22222 Marine Corps Institute | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22643 Markham | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20772 Marlboro | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20746 Marlow Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20748 Marlow Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20748 Marlow Hgts | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20058 Marriott Corp | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20115 Marshall | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20116 Marshall | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20616 Marshall Hall | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 25401 Martinsburg | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 25402 Martinsburg | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 25403 Martinsburg | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 25404 Martinsburg | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 25405 Martinsburg | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 25429 Martinsburg | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 22079 Mason Neck | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20598 Mc Lean | 202 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22067 Mc Lean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22101 Mc Lean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22102 Mc Lean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22103 Mc Lean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22106 Mc Lean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22107 Mc Lean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22108 Mc Lean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22109 Mc Lean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22134 MCB Quantico | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20598 McLean | 202 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22101 McLean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22102 McLean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22103 McLean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22106 McLean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20419 Merit Systems Protection Bd | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22081 Merrifield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22082 Merrifield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22116 Merrifield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22118 Merrifield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22119 Merrifield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20117 Middleburg | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20118 Middleburg | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21769 Middletown | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22645 Middletown | 540 | Frederick County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22649 Middletown | 540 | Warren County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 25430 Middleway | 304 | Jefferson County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 22728 Midland | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20398 Military Sealift Command | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 25432 Millville | 304 | Jefferson County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 22646 Millwood | 540 | Clarke County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22729 Mitchells | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20716 Mitchellville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20717 Mitchellville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20721 Mitchellville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22037 Mobil Oil Corp | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21770 Monrovia | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22025 Montclair | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20877 Montgomery Village | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20879 Montgomery Village | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20886 Montgomery Village | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20877 Montgomry Village | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20879 Montgomry Village | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20886 Montgomry Village | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20708 Montpelier | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20709 Montpelier | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20746 Morningside | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22712 Morrisville | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22042 Mosby | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21771 Mount Airy | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20712 Mount Rainier | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22121 Mount Vernon | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20661 Mount Victoria | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20135 Mount Weather | 540 | Clarke County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22611 Mount Weather | 540 | Clarke County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21773 Myersville | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20662 Nanjemoy | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20418 National Academy of Science | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20546 National Aero and Space Admin | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20408 National Archives and Records | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20149 National Assn Letter Carriers | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20576 National Capitol Planning | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20218 National Comm on Social Sec | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20456 National Credit Union Admin | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20565 National Gallery of Art | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20745 National Harbor | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20303 National Imaging and Mapping | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20208 National Institute of Educ | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20892 National Institute of Health | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20899 National Institute Stds & Tech | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20570 National Labor Relations Board | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20894 National Library of Medicine | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20572 National Mediation Board | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20889 National Naval Medical Center | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20242 National Park Service | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20082 National Repub Cong Comm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20097 National Repub Cong Comm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22160 National Right to Work Comm | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22230 National Science Foundation | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20504 National Security Counsel | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20435 National Selective Service | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20594 National Trans Safety Board | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22243 Naval Air System Command | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20373 Naval Anacost Annex | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20389 Naval Intelligence Com | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20395 Naval Intelligence Support C | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20388 Naval Investigative Service | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20375 Naval Research Laboratory | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20376 Naval Sea Sys | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20376 Naval Sea Systems Command | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20373 Naval Station Anacostia | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22241 Naval Supply System Command | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22448 Naval Surface Weapons Center | 540 | King George County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20394 Naval Telecommunications Com | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20370 Navy Annex | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22119 Navy Federal Credit Union | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22212 Navy Mutual Aid Assoc | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20392 Navy Observatory | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22242 Navy Sea Systems Command | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20393 Navy Security Group | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20374 Navy Yard | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20187 New Baltimore | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20784 New Carrolltn | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20784 New Carrollton | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21774 New Market | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21775 New Midway | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20664 Newburg | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20682 Newburg | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22122 Newington | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22526 Ninde | 540 | King George County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20852 No Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20722 No Brentwood | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20878 No Potomac | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20181 Nokesville | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20182 Nokesville | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20906 Norbeck | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20714 North Beach | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20852 North Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20895 North Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20722 North Brentwo | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20722 North Brentwood | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20740 North College Park | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20785 North Englewood | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20878 North Potomac | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22151 North Springfield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22151 North Springfld | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 25429 North Thompson Outfitters | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 22081 Northern Virginia | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22081 Northern Virginia Facility | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20555 Nuclear Regulatory Comm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20171 Oak Hill | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22124 Oakton | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22185 Oakton | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22125 Occoquan | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20503 Office of Mgmt and Budget | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22217 Office of Naval Research | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20552 Office of Thrift Supervision | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20211 Office of Workers Comp | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20415 Office Personnel Mgmt | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20830 Olney | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20832 Olney | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20186 Opal | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20128 Orlean | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22610 Overall | 540 | Warren County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20527 Oversea Pvt Inves Corp | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22485 Owens | 540 | King George County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20736 Owings | 301/240/227 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20745 Oxon Hill | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20750 Oxon Hill | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20068 P E P C O | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20129 Paeonian Springs | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20785 Palmer Park | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 56901 Parcel Return Service | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56902 Parcel Return Service | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56904 Parcel Return Service | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56915 Parcel Return Service | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56920 Parcel Return Service | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56933 Parcel Return Service | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56944 Parcel Return Service | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56972 Parcel Return Service | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56901 Parcel Return Svc | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56902 Parcel Return Svc | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56904 Parcel Return Svc | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56915 Parcel Return Svc | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56920 Parcel Return Svc | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56933 Parcel Return Svc | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56944 Parcel Return Svc | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56972 Parcel Return Svc | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20130 Paris | 540 | Clarke County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22534 Partlow | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20524 Passport Office | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20526 Peace Corps | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20050 Pentagon | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20301 Pentagon | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20355 Pentagon | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20067 Pepco | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20266 Philatelic Sales | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20265 Philatelic Sales Division | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20131 Philomont | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22043 Pimmit | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20640 Pisgah | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20073 PNC Financial | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20074 PNC Financial | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20075 PNC Financial | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 21777 Point of Rocks | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20675 Pomfret | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20837 Poolesville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20676 Port Republic | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20677 Port Tobacco | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20268 Postal Rate Comm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20854 Potomac | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20859 Potomac | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22301 Potomac | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20165 Potomac Falls | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20678 Pr Frederick | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20599 Pre Inaugural Committee | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20270 Presidential Transition Team | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20678 Prince Frederick | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20788 Prince George Plaza | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20782 Prince Georges Metro Center | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22192 Prince William | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22192 Prince Wm | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20678 Prnc Frederck | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 56901 Prs | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56902 Prs | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56904 Prs | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56915 Prs | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56920 Prs | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56933 Prs | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56944 Prs | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 56972 Prs | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20132 Purcellville | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20134 Purcellville | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20160 Purcellville | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22134 Quantico | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22135 Quantico | 703/571 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22134 Quantico Naval Hospital | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22701 Raccoon Ford | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 25438 Ranson | 304 | Jefferson County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 22733 Rapidan | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20299 Readasorus | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20140 Rectortown | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22649 Reliance | 540 | Warren County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22734 Remington | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20434 Resolution Trust Corporation | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20232 Resolutn Trust Oversight Brd | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20190 Reston | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20191 Reston | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20192 Reston | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20194 Reston | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20195 Reston | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20196 Reston | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20598 Reston | 202 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22095 Reston | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22096 Reston | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22701 Reva | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22735 Reva | 540 | Madison County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22736 Richardsville | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22109 Richmond | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22118 Richmond | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 25440 Ridgeway | 304 | Berkeley County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 25441 Rippon | 304 | Jefferson County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 20658 Rison | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20737 Riverdale | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20738 Riverdale | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22630 Riverton | 540 | Warren County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22737 Rixeyville | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20682 Rock Point | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20847 Rockville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20848 Rockville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20849 Rockville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20850 Rockville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20851 Rockville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20852 Rockville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20853 Rockville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20854 Rockville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20855 Rockville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20857 Rockville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20859 Rockville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21778 Rocky Ridge | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20781 Rogers Heights | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22544 Rollins Fork | 540 | King George County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20714 Rose Haven | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22209 Rosslyn | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20141 Round Hill | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20142 Round Hill | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22545 Ruby | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21780 Sabillasville | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20602 Saint Charles | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20603 Saint Charles | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20604 Saint Charles | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20685 Saint Leonard | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20860 Sandy Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20703 Seabrook | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20706 Seabrook | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22547 Sealston | 540 | King George County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20743 Seat Pleasant | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20549 Securities and Exchange Comm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22044 Seven Corners | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20078 Shared Brm | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 25442 Shenandoah Junction | 304 | Jefferson County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 25442 Shendoah Jct | 304 | Jefferson County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 25443 Shepherdstown | 304 | Jefferson County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 22485 Shiloh | 540 | King George County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20746 Silver Hill | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20901 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20902 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20903 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20904 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20905 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20906 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20907 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20908 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20910 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20911 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20912 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20913 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20914 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20915 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20916 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20918 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20993 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20997 Silver Spring | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20416 Small Business Admin | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20560 Smithsonian Institute | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22553 Snell | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20206 Soc Sec Bureau Hearing App | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20254 Social Security | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20317 Soldiers Airmens Home | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20688 Solomons | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20815 Somerset | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22739 Somerville | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22204 South | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20716 South Bowie | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20152 South Riding | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22026 Southbridge | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20697 Southern Md Brmas | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20797 Southern Md Brmas | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20697 Southern MD Facility | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20790 Southern MD Facility | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20791 Southern MD Facility | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20797 Southern MD Facility | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22245 Space & Naval Warfare System | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20868 Spencerville | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22551 Spotsylvania | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22553 Spotsylvania | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20774 Springdale | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20598 Springfield | 202 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22009 Springfield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22015 Springfield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22150 Springfield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22151 Springfield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22152 Springfield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22153 Springfield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22156 Springfield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22158 Springfield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22159 Springfield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22160 Springfield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22161 Springfield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20196 Sprint | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22096 Sprint | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22554 Stafford | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22555 Stafford | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22556 Stafford | 540 | Stafford County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20103 Stamp Distribution Network | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20521 State Department | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 21709 State Farm Ins Co | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20163 Sterling | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20164 Sterling | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20165 Sterling | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20166 Sterling | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20167 Sterling | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20598 Sterling | 202 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22741 Stevensburg | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20697 Sthrn MD Fac | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20797 Sthrn MD Fac | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20105 Stone Ridge | 703/571 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20897 Subn MD Fac | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20897 Suburb Maryland Fac | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20898 Suburb Maryland Fac | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20897 Suburban Md Brmas | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20109 Sudley Springs | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20746 Suitland | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20752 Suitland | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20120 Sully Station | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22742 Sumerduck | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 25446 Summit Point | 304 | Jefferson County | West Virginia - WV | Washington, DC-MD-VA (8840) | MSA |
| 22334 Sun Trust Bank | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20042 Sun Trust Bank Inc | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20689 Sunderland | 410/443/667 | Calvert County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20833 Sunshine | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20423 Surface Transportation Board | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20645 Swan Point | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20901 Takoma Park | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20903 Takoma Park | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20910 Takoma Park | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20912 Takoma Park | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20913 Takoma Park | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20746 Temple Hills | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20748 Temple Hills | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20752 Temple Hills | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20757 Temple Hills | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20762 Temple Hills | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20444 Tennessee Valley Auth | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20198 The Plns | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22304 Theological Seminary | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22565 Thornburg | 540 | Spotsylvania County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21788 Thurmont | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22304 Trade Center | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22172 Triangle | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21790 Tuscarora | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20781 Tuxedo | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22227 U S Air | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20062 U S Chamber of Com | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20192 U S Geological Survey | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20508 U S Trade Representative | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 21792 Unionville | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20510 United States Senate | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20833 Unity | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20289 Universal Postal Union Congr | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20742 University of Maryland | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20782 University Pa | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20782 University Park | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20772 Upper Marlboro | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20773 Upper Marlboro | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20774 Upper Marlboro | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20775 Upper Marlboro | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20792 Upper Marlboro | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20184 Upperville | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20185 Upperville | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20772 Uppr Marlboro | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20773 Uppr Marlboro | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20774 Uppr Marlboro | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20775 Uppr Marlboro | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20792 Uppr Marlboro | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20774 UPR Marlboro | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21704 Urbana | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20314 US Army Corp of Engineers | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22333 Us Army Mat Com | 703/571 | Alexandria City County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20229 Us Bureau of Customs | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20529 US Citizenship Immigration | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20593 Us Coast Guard | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20559 Us Copyright Office | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20439 Us Court Appeal Fed Circuit | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20220 US Department of Treasury | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20202 US Dept of Education | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20201 US Dept of Hlth Human Serv | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20212 US Dept of Labor Stats | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20993 Us Food and Drug Admin | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20238 Us Holocaust Memorial Museum | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20515 Us House of Representatives | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20547 Us Information Agency | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20390 Us Marine Corps Barracks | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22240 Us Navy Accounting Office | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20223 US Secret Service | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20203 US Social Securtiy Admin | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20543 Us Supreme Court | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20586 Us Synthetic Fuel Corp | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20217 Us Tax Court | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20222 Us Treasurer | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22246 US Unmanned Aerial Vehicles | 703/571 | Arlington County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22108 USA Today | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20261 USPS Consumer Affairs | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20260 USPS Headquarters | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20053 Verizon | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20420 Veterans Admin | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20421 Veterans Benefits Office | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20422 Veterans Hospital | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22027 Vienna | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22124 Vienna | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22180 Vienna | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22181 Vienna | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22182 Vienna | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22183 Vienna | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22185 Vienna | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20098 Vietnam Vet Mem Fund | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20106 Viewtown | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22746 Viewtown | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20187 Vint Hill Farms | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20188 Vint Hill Farms | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20187 Vint Hill Frm | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20188 Vint Hill Frm | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20061 Wachovia | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 22109 Wachovia Bank | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20601 Waldorf | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20602 Waldorf | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20603 Waldorf | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20604 Waldorf | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 21793 Walkersville | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20307 Walter Reed Army Med Center | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20186 Warrenton | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20187 Warrenton | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20188 Warrenton | 540 | Fauquier County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20032 Wash | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20080 Wash Gas | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20069 Wash Intell Bureau Inc | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20032 Washing | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20032 Washingtn | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20880 Washingtn Grv | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20001 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20002 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20003 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20004 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20005 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20006 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20007 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20008 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20009 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20010 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20011 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20012 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20013 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20015 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20016 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20017 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20018 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20019 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20020 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20022 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20023 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20024 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20026 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20027 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20029 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20030 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20032 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20033 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20035 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20036 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20037 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20038 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20039 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20040 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20041 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20042 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20043 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20044 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20045 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20046 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20047 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20049 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20050 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20051 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20052 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20053 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20055 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20056 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20057 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20058 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20059 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20060 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20061 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20062 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20063 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20064 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20065 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20066 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20067 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20068 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20069 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20070 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20071 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20073 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20074 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20075 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20076 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20077 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20078 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20080 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20081 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20082 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20088 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20090 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20091 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20097 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20098 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20201 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20202 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20203 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20204 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20206 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20207 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20208 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20210 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20211 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20212 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20213 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20214 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20215 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20216 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20217 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20218 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20219 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20220 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20221 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20222 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20223 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20224 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20226 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20227 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20228 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20229 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20230 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20232 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20233 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20235 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20237 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20238 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20239 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20240 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20241 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20242 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20244 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20245 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20250 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20251 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20254 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20260 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20261 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20262 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20265 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20266 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20268 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20270 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20277 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20289 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20299 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20301 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20303 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20306 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20307 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20310 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20314 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20317 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20318 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20319 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20330 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20340 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20350 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20355 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20370 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20372 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20373 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20374 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20375 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20376 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20380 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20388 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20389 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20390 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20391 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20392 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20393 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20394 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20395 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20398 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20401 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20402 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20403 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20404 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20405 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20406 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20407 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20408 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20409 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20410 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20411 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20412 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20413 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20414 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20415 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20416 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20418 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20419 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20420 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20421 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20422 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20423 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20424 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20425 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20426 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20427 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20428 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20429 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20431 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20433 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20434 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20435 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20436 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20437 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20439 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20440 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20441 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20442 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20444 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20447 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20451 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20453 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20456 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20460 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20463 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20468 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20469 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20470 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20472 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20500 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20501 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20502 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20503 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20504 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20505 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20506 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20507 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20508 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20509 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20510 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20511 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20515 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20520 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20521 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20522 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20523 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20524 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20525 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20526 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20527 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20528 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20529 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20530 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20531 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20532 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20533 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20534 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20535 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20536 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20537 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20538 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20539 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20540 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20541 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20542 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20543 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20544 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20546 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20547 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20548 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20549 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20551 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20552 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20553 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20554 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20555 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20557 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20558 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20559 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20560 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20565 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20566 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20570 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20571 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20572 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20573 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20575 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20576 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20577 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20578 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20579 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20580 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20581 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20585 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20586 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20590 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20591 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20593 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20594 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20597 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20599 Washington | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20799 Washington Bmc | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20066 Washington DC Post Office | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20081 Washington Gas | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20880 Washington Grove | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20070 Washington Intel Bur | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20374 Washington Na | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20376 Washington Na | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20388 Washington Na | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20391 Washington Na | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20398 Washington Na | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20374 Washington Navy Yard | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20376 Washington Navy Yard | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20388 Washington Navy Yard | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20391 Washington Navy Yard | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20398 Washington Navy Yard | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20071 Washington Post | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20197 Waterford | 540 | Loudoun County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22191 Wdbg | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20693 Welcome | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20827 West Bethesda | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20719 West Bowie | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20782 West Hyattsville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20788 West Hyattsville | 301/240/227 | Prince Georges County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22102 West McLean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22103 West McLean | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22152 West Springfield | 703/571 | Fairfax County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 20817 Westlake | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20827 Westlake | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20902 Wheaton | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20906 Wheaton | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20915 Wheaton | 301/240/227 | Montgomery County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20501 White House Ofc of Vice Pres | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20502 White House Ofc Staff | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20509 White House Ofc Staff | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20695 White Plns | 301/240/227 | Charles County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 22663 White Post | 540 | Clarke County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22701 Winston | 540 | Culpeper County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22191 Woodbridge | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22192 Woodbridge | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22193 Woodbridge | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22194 Woodbridge | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 22195 Woodbridge | 703/571 | Prince William County | Virginia - VA | Washington, DC-MD-VA (8840) | MSA |
| 21798 Woodsboro | 301/240/227 | Frederick County | Maryland - MD | Washington, DC-MD-VA (8840) | MSA |
| 20051 Woodward and Lothrop | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |
| 20433 World Bank | 202 | District of Columbia County | District of Columbia - DC | Washington, DC-MD-VA (8840) | MSA |