| 50607 Aurora | 319 | Buchanan County | Iowa (IA) |
| 50629 Fairbank | 319 | Buchanan County | Iowa (IA) |
| 50641 Hazleton | 319 | Buchanan County | Iowa (IA) |
| 50644 Doris | 319 | Buchanan County | Iowa (IA) |
| 50644 Otterville | 319 | Buchanan County | Iowa (IA) |
| 50644 Independence | 319 | Buchanan County | Iowa (IA) |
| 50648 Jesup | 319 | Buchanan County | Iowa (IA) |
| 50648 Shady Grove | 319 | Buchanan County | Iowa (IA) |
| 50648 Littleton | 319 | Buchanan County | Iowa (IA) |
| 50650 Lamont | 319 | Buchanan County | Iowa (IA) |
| 50671 Stanley | 319 | Buchanan County | Iowa (IA) |
| 50682 Winthrop | 319 | Buchanan County | Iowa (IA) |
| 52210 Brandon | 319 | Buchanan County | Iowa (IA) |
| 52326 Quasqueton | 319 | Buchanan County | Iowa (IA) |
| 52329 Rowley | 319 | Buchanan County | Iowa (IA) |