All assignees
605 prefixes in 641 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 641-428 | MASON CITY | 9631 | 2010-08-18 | Yes |
| 641-429 | JAMAICA | 1178 | — | Yes |
| 641-430 | MASON CITY | 6266 | — | Yes |
| 641-431 | YALE | 6266 | — | Yes |
| 641-432 | FORESTCITY | 1167 | 2016-07-28 | Yes |
| 641-433 | WHAT CHEER | 1167 | 2006-07-13 | Yes |
| 641-435 | NASHUA | 9631 | — | Yes |
| 641-436 | CENTERVL | 6570 | 2003-07-17 | Yes |
| 641-437 | CENTERVL | 1178 | — | Yes |
| 641-439 | YALE | 1271 | — | — |
| 641-440 | CLEAR LAKE | 751F | 2007-02-14 | Yes |
| 641-441 | KLEMME | 860F | 2019-09-12 | Yes |
| 641-442 | DAVIS CITY | 1888 | — | Yes |
| 641-443 | GARDEN GRV | 1888 | — | — |
| 641-444 | BELMOND | 1127 | — | Yes |
| 641-445 | WELDON | 1888 | — | — |
| 641-446 | LEON | 1888 | — | Yes |
| 641-447 | MURRAY | 1094 | — | — |
| 641-448 | MELCHER | 221F | 2019-11-05 | Yes |
| 641-449 | NEWVIRGINI | 1178 | — | Yes |
| 641-450 | MASON CITY | 068H | 2013-05-16 | Yes |
| 641-451 | FAIRFIELD | 6570 | 2003-07-14 | Yes |
| 641-452 | UNIONVILLE | 1178 | — | Yes |
| 641-453 | NEW HAVEN | 1177 | 2006-05-01 | — |
| 641-454 | MANLY | 9631 | — | Yes |
| 641-455 | OTTUMWA | 6529 | 2001-02-09 | Yes |
| 641-456 | HAMPTON | 9631 | — | Yes |
| 641-457 | LELAND | 751F | 2007-02-14 | Yes |
| 641-458 | GENEVA | 9631 | — | Yes |
| 641-459 | FLORIS | 1129 | — | — |
| 641-461 | CHARLES CY | 321J | 2019-08-29 | Yes |
| 641-464 | MOUNT AYR | 1178 | — | Yes |
| 641-465 | KLEMME | 860F | 2010-02-25 | — |
| 641-466 | LIBERTYCTR | 1178 | — | Yes |
| 641-469 | FAIRFIELD | 1170 | — | — |
| 641-470 | FAIRFIELD | 1170 | — | — |
| 641-472 | FAIRFIELD | 1170 | — | — |
| 641-473 | GLADBROOK | 1167 | — | Yes |
| 641-474 | GREEN MT | 1297 | — | Yes |
| 641-475 | HAVERHILL | 1297 | — | Yes |
| 641-476 | LAUREL | 1297 | — | Yes |
| 641-477 | CLEMONS | 1246 | — | — |
| 641-478 | FERGUSON | 1297 | — | Yes |
| 641-479 | LE GRAND | 1167 | — | Yes |
| 641-481 | TOLEDO | 6570 | 2003-07-17 | Yes |
| 641-482 | MELBOURNE | 1187 | — | — |
| 641-483 | STATE CTR | 1187 | — | — |
| 641-484 | TOLEDO | 1167 | — | Yes |
| 641-485 | MARSHALLTN | 6266 | — | Yes |
| 641-486 | UNION | 1297 | — | — |
| 641-487 | ZEARING | 1246 | — | — |
| 641-488 | ALBION | 1297 | — | Yes |
| 641-489 | CHELSEA | 1167 | — | Yes |
| 641-492 | MONTOUR | 1167 | — | Yes |
| 641-493 | RHODES | 1187 | — | — |
| 641-494 | MASON CITY | 9631 | — | Yes |
| 641-495 | GOODELL | 1127 | — | — |
| 641-496 | LISCOMB | 1297 | — | — |
| 641-497 | NEWPROVDNC | 1297 | — | — |
| 641-498 | GILMAN | 1187 | — | — |
| 641-499 | GARWIN | 1167 | — | Yes |
| 641-500 | IOWA FALLS | 197D | 2019-12-27 | Yes |
| 641-501 | MONTEZUMA | 1248 | 2018-07-06 | Yes |
| 641-502 | MELBOURNE | 1187 | — | — |
| 641-503 | MOUNT AYR | 221F | — | Yes |
| 641-504 | OSKALOOSA | 6529 | — | — |
| 641-505 | MANLY | 985E | 2017-07-20 | Yes |
| 641-506 | ZEARING | 6534 | 2021-12-03 | Yes |
| 641-507 | BAXTER | 1187 | — | — |
| 641-508 | OSCEOLA | 9877 | 2022-01-26 | Yes |
| 641-509 | NEW HAVEN | 1177 | 2006-10-16 | — |
| 641-510 | GRINNELL | 6529 | — | — |
| 641-511 | XXXXXXXXXX | MULT | — | — |
| 641-512 | MASON CITY | 6266 | — | Yes |
| 641-513 | MASON CITY | 221F | 2024-03-12 | Yes |
| 641-514 | THOMPSON | 6534 | 2022-02-22 | — |
| 641-515 | — | — | ||
| 641-516 | MARSHALLTN | 6570 | 2021-01-21 | Yes |
| 641-517 | OSKALOOSA | 6529 | 2022-01-13 | Yes |
| 641-518 | DELTA | 624H | 2024-03-28 | Yes |
| 641-519 | GARNER | 751F | 2010-03-10 | Yes |
| 641-521 | NEWTON | 6266 | — | Yes |
| 641-522 | BROOKLYN | 1113 | — | — |
| 641-523 | CORYDON | 751F | 2010-03-08 | Yes |
| 641-524 | MENLO | 1137 | — | — |
| 641-525 | CLEAR LAKE | 6570 | — | Yes |
| 641-526 | KELLOGG | 1187 | — | — |
| 641-527 | LYNNVILLE | 1232 | — | — |
| 641-528 | MALCOM | 1167 | — | Yes |
| 641-529 | CLEAR LAKE | 6570 | — | Yes |
| 641-530 | MASON CITY | 6570 | — | Yes |
| 641-531 | IOWA FALLS | 8344 | 2017-04-19 | Yes |
| 641-533 | DERBY | 1888 | — | — |
| 641-534 | LACONA | 1178 | — | Yes |
| 641-535 | RUSSELL | 1178 | — | Yes |
| 641-536 | LENOX | 168F | 2008-06-26 | — |
| 641-541 | SIGOURNEY | 6570 | — | Yes |
| 641-543 | ALTA VISTA | 516J | 2022-02-28 | Yes |
| 641-548 | MASON CITY | 6529 | 2018-03-06 | Yes |
| 641-551 | NEW HAVEN | 1177 | 2006-05-01 | — |
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.