All assignees
579 prefixes in 319 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 319-500 | VINTON | 965H | 2019-12-17 | Yes |
| 319-501 | BRIGHTON | 6529 | 2024-10-04 | Yes |
| 319-502 | WATERLOO | 9877 | 2024-11-14 | Yes |
| 319-503 | CEDAR RPDS | 478J | 2025-03-03 | Yes |
| 319-504 | WATERLOO | 6529 | — | Yes |
| 319-505 | WATERLOO | 6570 | 2012-09-25 | Yes |
| 319-508 | KEOSAUQUA | 6529 | 2022-09-16 | Yes |
| 319-509 | OELWEIN | 6529 | — | — |
| 319-510 | BURLINGTON | 6570 | 2025-09-03 | Yes |
| 319-511 | XXXXXXXXXX | MULT | — | — |
| 319-512 | IOWA CITY | 6534 | — | Yes |
| 319-515 | CEDAR RPDS | 624H | 2023-12-05 | Yes |
| 319-519 | IOWA CITY | 423H | 2014-10-22 | Yes |
| 319-520 | KEOKUK | 6570 | — | Yes |
| 319-521 | CEDAR RPDS | 6529 | — | — |
| 319-523 | WAPELLO | 1178 | — | Yes |
| 319-524 | KEOKUK | 9631 | — | — |
| 319-525 | HARTWICK | 1139 | — | — |
| 319-526 | KEOKUK | 9631 | — | Yes |
| 319-527 | WAPELLO | 4650 | — | Yes |
| 319-528 | DENMARK | 1178 | — | Yes |
| 319-529 | WATERLOO | 6570 | 2010-09-02 | Yes |
| 319-530 | IOWA CITY | 6266 | — | Yes |
| 319-531 | CEDAR RPDS | 6570 | — | Yes |
| 319-533 | CEDAR RPDS | 6529 | — | Yes |
| 319-534 | DANVILLE | 751F | 2007-01-30 | Yes |
| 319-535 | MT VERNON | 985E | 2006-07-24 | Yes |
| 319-536 | CEDAR RPDS | 527G | 2011-11-10 | Yes |
| 319-537 | MTPLEASANT | 6529 | 2001-05-30 | — |
| 319-538 | CEDAR RPDS | 221F | 2007-12-18 | Yes |
| 319-539 | RIVERSIDE | 221F | 2021-12-08 | Yes |
| 319-540 | CEDAR RPDS | 6266 | — | Yes |
| 319-541 | IOWA CITY | 6570 | — | Yes |
| 319-543 | SOLON | 593K | 2006-03-28 | Yes |
| 319-545 | TIFFIN | 562E | — | — |
| 319-548 | WASHINGTON | 6529 | — | — |
| 319-549 | OLDS | 198H | 2014-11-11 | Yes |
| 319-550 | CEDAR RPDS | 6266 | — | Yes |
| 319-551 | CEDAR RPDS | 6266 | — | Yes |
| 319-552 | MTPLEASANT | 1178 | 2015-06-25 | Yes |
| 319-553 | CEDARFALLS | 829J | — | Yes |
| 319-554 | BRIGHTON | 6529 | 2025-09-04 | Yes |
| 319-555 | DIR ASST | MULT | — | — |
| 319-558 | CEDAR RPDS | 9631 | — | Yes |
| 319-559 | WAVERLY | 6266 | 2012-09-10 | Yes |
| 319-560 | CEDAR RPDS | 6266 | — | Yes |
| 319-561 | FT MADISON | 6529 | 2001-05-30 | — |
| 319-566 | RICHLAND | 516J | 2022-03-14 | Yes |
| 319-569 | IOWA CITY | 593K | 2017-06-07 | Yes |
| 319-572 | BURLINGTON | 6266 | — | Yes |
| 319-573 | CEDAR RPDS | 6534 | 2001-01-19 | — |
| 319-575 | CEDARFALLS | 221F | — | Yes |
| 319-576 | BURLINGTON | 829J | — | Yes |
| 319-578 | SWISHER | 593K | 2006-11-14 | Yes |
| 319-582 | CEDAR RPDS | 996H | 2018-09-07 | Yes |
| 319-585 | HAZLETON | 593K | 2006-04-21 | Yes |
| 319-587 | CEDAR RPDS | 114J | 2026-03-19 | Yes |
| 319-588 | ARGYLE | 516J | 2022-02-24 | Yes |
| 319-589 | ALBURNETT | 544H | 2015-05-14 | Yes |
| 319-591 | WASHINGTON | 6266 | — | Yes |
| 319-592 | BONAPARTE | 1319 | — | — |
| 319-594 | IOWA CITY | 6529 | — | Yes |
| 319-595 | WATERLOO | 593K | 2018-06-14 | Yes |
| 319-596 | WAVERLY | 829J | — | Yes |
| 319-598 | WASHINGTON | 2842 | 2001-05-25 | Yes |
| 319-600 | IOWA CITY | 965H | 2019-04-05 | Yes |
| 319-601 | BURLINGTON | 6529 | 2001-02-09 | Yes |
| 319-602 | HUDSON | 221F | — | Yes |
| 319-609 | AURORA | 544H | 2015-05-14 | Yes |
| 319-610 | WATERLOO | 6534 | 2001-06-14 | Yes |
| 319-611 | XXXXXXXXXX | MULT | — | — |
| 319-614 | PACKWOOD | 6534 | 2001-07-11 | Yes |
| 319-619 | MONTROSE | 5562 | 2021-06-23 | Yes |
| 319-621 | IOWA CITY | 6529 | — | Yes |
| 319-622 | AMANA | 1298 | — | — |
| 319-623 | LADORA | 1139 | — | — |
| 319-624 | SOLON | 562E | — | — |
| 319-625 | NO LIBERTY | 1298 | — | — |
| 319-626 | NO LIBERTY | 1298 | — | — |
| 319-627 | W LIBERTY | 1332 | — | — |
| 319-628 | OXFORD | 1167 | — | Yes |
| 319-629 | LONE TREE | 1178 | — | Yes |
| 319-631 | IOWA CITY | 6529 | — | Yes |
| 319-632 | NO LIBERTY | 1298 | — | — |
| 319-633 | LONE TREE | 593K | 2006-03-28 | Yes |
| 319-634 | AURORA | 1156 | — | — |
| 319-635 | FAIRBANK | 1167 | — | Yes |
| 319-636 | HAZLETON | 1167 | — | Yes |
| 319-638 | ORAN | 1266 | — | — |
| 319-639 | KINROSS | 1247 | — | — |
| 319-640 | CEDAR RPDS | 6570 | — | Yes |
| 319-642 | MARENGO | 1167 | — | Yes |
| 319-643 | WESTBRANCH | 1332 | — | — |
| 319-644 | SOLON | 1178 | — | Yes |
| 319-645 | TIFFIN | 1167 | — | Yes |
| 319-646 | WELLMAN | 1329 | — | — |
| 319-647 | VICTOR | 1139 | — | — |
| 319-648 | RIVERSIDE | 1178 | — | Yes |
| 319-651 | CEDAR RPDS | 6529 | — | Yes |
| 319-652 | TRAER | 593K | 2006-04-21 | 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.