All assignees
579 prefixes in 319 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 319-400 | IOWA CITY | 6534 | 2001-01-19 | Yes |
| 319-401 | TRIPOLI | 8344 | 2023-04-04 | Yes |
| 319-402 | IOWA CITY | 318J | 2023-04-10 | Yes |
| 319-403 | CEDAR RPDS | 490J | 2023-04-10 | Yes |
| 319-404 | WATERLOO | 6266 | — | Yes |
| 319-405 | ANAMOSA | 985E | 2022-01-27 | Yes |
| 319-406 | DENVER | 7421 | 2001-09-12 | Yes |
| 319-407 | WAVERLY | 6266 | 2021-12-14 | Yes |
| 319-408 | LISBON | 593K | 2010-03-09 | Yes |
| 319-409 | CEDAR RPDS | 829J | 2011-11-23 | Yes |
| 319-410 | OELWEIN | 444G | 2021-12-29 | Yes |
| 319-411 | XXXXXXXXXX | MULT | — | — |
| 319-412 | CEDAR RPDS | 6529 | 2018-02-12 | Yes |
| 319-413 | TROY MILLS | 221F | 2023-04-11 | Yes |
| 319-414 | KEOSAUQUA | 6529 | 2023-08-18 | Yes |
| 319-415 | WATERLOO | 6266 | 2001-03-27 | Yes |
| 319-416 | VINTON | 732J | 2023-06-14 | Yes |
| 319-417 | FT MADISON | 6570 | 2023-09-25 | Yes |
| 319-418 | GRUNDY CTR | 346F | 2025-08-01 | Yes |
| 319-419 | WAVERLY | 6529 | 2018-03-09 | Yes |
| 319-420 | WATERLOO | 221F | 2023-06-29 | Yes |
| 319-421 | SHELL ROCK | 593K | 2006-11-14 | Yes |
| 319-422 | PARKERSBG | 221F | 2021-04-15 | Yes |
| 319-423 | CEDAR RPDS | 8344 | 2010-05-06 | Yes |
| 319-424 | CEDAR RPDS | 700J | 2025-11-26 | Yes |
| 319-425 | ANAMOSA | 351F | 2008-12-17 | — |
| 319-426 | FAIRBANK | 516J | 2022-02-17 | Yes |
| 319-427 | WATERLOO | 6570 | — | Yes |
| 319-428 | BURLINGTON | 6266 | 2023-12-11 | Yes |
| 319-429 | WATERLOO | 6266 | 2007-06-07 | Yes |
| 319-430 | IOWA CITY | 6266 | — | Yes |
| 319-431 | CEDAR RPDS | 6529 | — | Yes |
| 319-432 | CEDAR RPDS | 221F | 2008-07-24 | Yes |
| 319-433 | WATERLOO | 829J | — | Yes |
| 319-434 | BELLEPLAIN | 4189 | — | — |
| 319-435 | COGGON | 9631 | — | Yes |
| 319-436 | SHELLSBURG | 1173 | — | — |
| 319-437 | PRAIRIEBG | 1275 | — | — |
| 319-438 | CENTRAL CY | 1167 | — | Yes |
| 319-439 | ELBERON | 1217 | — | — |
| 319-440 | CEDAR RPDS | 6570 | — | Yes |
| 319-441 | CENTER PT | 985E | 2022-01-14 | Yes |
| 319-442 | KEYSTONE | 1217 | — | — |
| 319-443 | URBANA | 1173 | — | — |
| 319-444 | BELLEPLAIN | 1167 | — | Yes |
| 319-445 | REINBECK | 593K | 2006-05-15 | Yes |
| 319-446 | ATKINS | 1101 | — | — |
| 319-447 | CEDAR RPDS | 9631 | — | Yes |
| 319-448 | WALKER | 1167 | — | Yes |
| 319-449 | CEDAR RPDS | 221F | 2014-03-07 | Yes |
| 319-450 | CEDAR RPDS | 6570 | — | Yes |
| 319-451 | CEDAR RPDS | 985E | 2022-10-18 | Yes |
| 319-452 | COLUMBSJCT | 6570 | 2023-07-13 | Yes |
| 319-453 | SHELLSBURG | 1173 | — | — |
| 319-454 | BLAIRSTOWN | 1136 | — | Yes |
| 319-455 | LISBON | 1170 | — | Yes |
| 319-456 | RICHLAND | 1178 | — | Yes |
| 319-457 | BURLINGTON | 6529 | — | — |
| 319-458 | WASHINGTON | 6570 | — | Yes |
| 319-459 | NO LIBERTY | 593K | 2010-03-08 | Yes |
| 319-460 | WASHINGTON | 6570 | — | Yes |
| 319-461 | WASHINGTON | 6266 | — | Yes |
| 319-462 | ANAMOSA | 9631 | — | Yes |
| 319-463 | MONTROSE | 1178 | — | Yes |
| 319-464 | WATERLOO | 7421 | — | Yes |
| 319-465 | MONTICELLO | 9631 | — | Yes |
| 319-466 | IOWA CITY | 9631 | — | — |
| 319-467 | IOWA CITY | 9631 | — | — |
| 319-468 | INDEPNDNCE | 221F | 2023-06-29 | Yes |
| 319-469 | HOUGHTON | 1178 | — | Yes |
| 319-470 | FT MADISON | 6266 | — | Yes |
| 319-471 | IOWA CITY | 6529 | — | Yes |
| 319-472 | VINTON | 9631 | — | Yes |
| 319-473 | KEOKUK | 6529 | 2001-05-30 | — |
| 319-474 | BRANDON | 1178 | — | Yes |
| 319-475 | MT AUBURN | 1220 | — | — |
| 319-476 | DYSART | 1162 | — | Yes |
| 319-477 | GARRISON | 1217 | — | — |
| 319-478 | TRAER | 1167 | — | Yes |
| 319-479 | CLUTIER | 1162 | — | — |
| 319-480 | ANAMOSA | 6266 | — | Yes |
| 319-481 | ANAMOSA | 6570 | — | Yes |
| 319-482 | MARTELLE | 1238 | — | — |
| 319-483 | WAVERLY | 9631 | — | Yes |
| 319-484 | OLIN | 1264 | — | — |
| 319-485 | IOWA CITY | 829J | 2024-02-15 | Yes |
| 319-486 | WATERLOO | 6529 | 2011-04-28 | Yes |
| 319-487 | CEDAR RPDS | 221F | 2024-03-28 | Yes |
| 319-488 | KEYSTONE | 6570 | 2011-02-21 | Yes |
| 319-489 | MORLEY | 1264 | — | — |
| 319-490 | CEDARFALLS | 221F | 2024-04-29 | Yes |
| 319-491 | CEDAR RPDS | 7421 | — | Yes |
| 319-492 | IOWA CITY | 221F | 2024-06-18 | Yes |
| 319-493 | WATERLOO | 6529 | — | Yes |
| 319-494 | MTSTERLING | 1319 | — | — |
| 319-495 | LAPORTE CY | 593K | 2006-11-14 | Yes |
| 319-496 | MONTICELLO | 6529 | 2024-07-18 | Yes |
| 319-497 | CEDAR RPDS | 7229 | 2024-09-05 | Yes |
| 319-498 | BIRMINGHAM | 1319 | — | — |
| 319-499 | IOWA CITY | 6529 | 2011-03-25 | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.