| 60101 Addison | 630/331 | Du Page County | Illinois (IL) |
| 60572 AT & T | 630/331 | Du Page County | Illinois (IL) |
| 60502 Aurora | 630/331 | Du Page County | Illinois (IL) |
| 60503 Aurora | 630/331 | Du Page County | Illinois (IL) |
| 60504 Aurora | 630/331 | Du Page County | Illinois (IL) |
| 60572 Aurora | 630/331 | Du Page County | Illinois (IL) |
| 60598 Aurora | 630/331 | Du Page County | Illinois (IL) |
| 60599 Aurora | 630/331 | Du Page County | Illinois (IL) |
| 60103 Bartlett | 630/331 | Du Page County | Illinois (IL) |
| 60105 Bensenville | 708/464 | Du Page County | Illinois (IL) |
| 60106 Bensenville | 630/331 | Du Page County | Illinois (IL) |
| 60399 Bensenville | 708/464 | Du Page County | Illinois (IL) |
| 60108 Bloomingdale | 630/331 | Du Page County | Illinois (IL) |
| 60117 Bloomingdale | 708/464 | Du Page County | Illinois (IL) |
| 60105 Bradford Group | 708/464 | Du Page County | Illinois (IL) |
| 60527 Burr Ridge | 630/331 | Du Page County | Illinois (IL) |
| 60527 Burridge | 630/331 | Du Page County | Illinois (IL) |
| 60116 Carol Stream | 630/331 | Du Page County | Illinois (IL) |
| 60122 Carol Stream | 847/224 | Du Page County | Illinois (IL) |
| 60128 Carol Stream | 630/331 | Du Page County | Illinois (IL) |
| 60132 Carol Stream | 630/331 | Du Page County | Illinois (IL) |
| 60188 Carol Stream | 630/331 | Du Page County | Illinois (IL) |
| 60197 Carol Stream | 630/331 | Du Page County | Illinois (IL) |
| 60199 Carol Stream | 630/331 | Du Page County | Illinois (IL) |
| 60122 Chase Bank | 847/224 | Du Page County | Illinois (IL) |
| 60132 Citicorp | 630/331 | Du Page County | Illinois (IL) |
| 60514 Clarendon Hills | 630/331 | Du Page County | Illinois (IL) |
| 60514 Clarendon Hls | 630/331 | Du Page County | Illinois (IL) |
| 60103 Cloverdale | 630/331 | Du Page County | Illinois (IL) |
| 60561 Darien | 630/331 | Du Page County | Illinois (IL) |
| 60515 Downers Grove | 630/331 | Du Page County | Illinois (IL) |
| 60516 Downers Grove | 630/331 | Du Page County | Illinois (IL) |
| 60517 Downers Grove | 630/331 | Du Page County | Illinois (IL) |
| 60126 Elmhurst | 630/331 | Du Page County | Illinois (IL) |
| 60519 Eola | 630/331 | Du Page County | Illinois (IL) |
| 60148 Flowerfield | 630/331 | Du Page County | Illinois (IL) |
| 60572 Fox Valley | 630/331 | Du Page County | Illinois (IL) |
| 60599 Fox Valley | 630/331 | Du Page County | Illinois (IL) |
| 60599 Fox Valley Facility | 630/331 | Du Page County | Illinois (IL) |
| 60137 Glen Ellyn | 630/331 | Du Page County | Illinois (IL) |
| 60138 Glen Ellyn | 630/331 | Du Page County | Illinois (IL) |
| 60137 Glendale Heights | 630/331 | Du Page County | Illinois (IL) |
| 60139 Glendale Heights | 630/331 | Du Page County | Illinois (IL) |
| 60117 Great Lakes Area Office | 708/464 | Du Page County | Illinois (IL) |
| 60521 Hinsdale | 630/331 | Du Page County | Illinois (IL) |
| 60522 Hinsdale | 630/331 | Du Page County | Illinois (IL) |
| 60523 Hinsdale | 630/331 | Du Page County | Illinois (IL) |
| 60128 Household Finance Corp | 630/331 | Du Page County | Illinois (IL) |
| 60116 Household Financial Services | 630/331 | Du Page County | Illinois (IL) |
| 60399 Inktel Marketing | 708/464 | Du Page County | Illinois (IL) |
| 60143 Itasca | 630/331 | Du Page County | Illinois (IL) |
| 60172 Keeneyville | 630/331 | Du Page County | Illinois (IL) |
| 60532 Lisle | 630/331 | Du Page County | Illinois (IL) |
| 60148 Lombard | 630/331 | Du Page County | Illinois (IL) |
| 60157 Medinah | 630/331 | Du Page County | Illinois (IL) |
| 60540 Naperville | 630/331 | Du Page County | Illinois (IL) |
| 60563 Naperville | 630/331 | Du Page County | Illinois (IL) |
| 60565 Naperville | 630/331 | Du Page County | Illinois (IL) |
| 60566 Naperville | 630/331 | Du Page County | Illinois (IL) |
| 60567 Naperville | 630/331 | Du Page County | Illinois (IL) |
| 60128 North Suburban | 630/331 | Du Page County | Illinois (IL) |
| 60132 North Suburban | 630/331 | Du Page County | Illinois (IL) |
| 60197 North Suburban | 630/331 | Du Page County | Illinois (IL) |
| 60199 North Suburban | 630/331 | Du Page County | Illinois (IL) |
| 60185 Northwoods | 630/331 | Du Page County | Illinois (IL) |
| 60521 Oak Brk Mall | 630/331 | Du Page County | Illinois (IL) |
| 60521 Oak Brook | 630/331 | Du Page County | Illinois (IL) |
| 60522 Oak Brook | 630/331 | Du Page County | Illinois (IL) |
| 60523 Oak Brook | 630/331 | Du Page County | Illinois (IL) |
| 60561 Oak Brook | 630/331 | Du Page County | Illinois (IL) |
| 60521 Oak Brook Mall | 630/331 | Du Page County | Illinois (IL) |
| 60181 Oakbrook Ter | 630/331 | Du Page County | Illinois (IL) |
| 60181 Oakbrook Terrace | 630/331 | Du Page County | Illinois (IL) |
| 60103 Ontarioville | 630/331 | Du Page County | Illinois (IL) |
| 60172 Roselle | 630/331 | Du Page County | Illinois (IL) |
| 60181 Villa Park | 630/331 | Du Page County | Illinois (IL) |
| 60555 Warrenville | 630/331 | Du Page County | Illinois (IL) |
| 60184 Wayne | 630/331 | Du Page County | Illinois (IL) |
| 60185 West Chicago | 630/331 | Du Page County | Illinois (IL) |
| 60186 West Chicago | 630/331 | Du Page County | Illinois (IL) |
| 60559 Westmont | 630/331 | Du Page County | Illinois (IL) |
| 60187 Wheaton | 630/331 | Du Page County | Illinois (IL) |
| 60189 Wheaton | 630/331 | Du Page County | Illinois (IL) |
| 60527 Willow Brook | 630/331 | Du Page County | Illinois (IL) |
| 60527 Willowbrook | 630/331 | Du Page County | Illinois (IL) |
| 60190 Winfield | 630/331 | Du Page County | Illinois (IL) |
| 60191 Wood Dale | 630/331 | Du Page County | Illinois (IL) |
| 60399 Wood Dale | 708/464 | Du Page County | Illinois (IL) |
| 60517 Woodridge | 630/331 | Du Page County | Illinois (IL) |