All assignees
759 prefixes in 605 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 605-300 | BERESFORD | 6534 | 2003-08-07 | Yes |
| 605-301 | PIERRE | 106F | 2001-02-09 | Yes |
| 605-302 | REDFIELD | 7076 | 2003-04-17 | Yes |
| 605-303 | WATERTOWN | 6569 | 2020-01-21 | Yes |
| 605-304 | WHITE | 920F | 2010-08-04 | Yes |
| 605-305 | SIOUX FLS | 073H | 2016-12-21 | Yes |
| 605-306 | SIOUX FLS | 7024 | 2001-05-07 | — |
| 605-307 | HILL CITY | 580H | 2019-04-25 | Yes |
| 605-308 | NOSIOUX CY | 6529 | 2022-06-13 | Yes |
| 605-309 | NOVALENTIN | 106F | 2014-01-14 | Yes |
| 605-310 | SIOUX FLS | 6569 | — | — |
| 605-311 | XXXXXXXXXX | MULT | — | — |
| 605-312 | SIOUX FLS | 9631 | 2007-10-02 | Yes |
| 605-313 | REDFIELD | 6125 | 2018-01-11 | Yes |
| 605-314 | MCLAUGHLIN | 374F | 2009-03-12 | — |
| 605-315 | ARLINGTON | 580H | 2019-05-07 | Yes |
| 605-316 | IROQUOIS | 580H | 2020-05-21 | Yes |
| 605-317 | MITCHELL | 162G | 2025-02-17 | Yes |
| 605-318 | PIERRE | 6569 | 2020-08-03 | Yes |
| 605-319 | MISSION | 6534 | 2009-06-12 | Yes |
| 605-320 | BROOKINGS | 6534 | 2025-08-07 | Yes |
| 605-321 | SIOUX FLS | 6569 | — | — |
| 605-322 | SIOUX FLS | 9631 | — | — |
| 605-323 | SIOUX FLS | 9631 | — | Yes |
| 605-324 | CRESBARD | 1680 | — | — |
| 605-325 | PIERPONT | 1680 | — | — |
| 605-326 | VIBORG | 1660 | — | — |
| 605-327 | FLYGER | 1652 | — | — |
| 605-328 | SIOUX FLS | 9631 | — | — |
| 605-329 | FREDERICK | 1664 | — | Yes |
| 605-330 | SIOUX FLS | 9631 | — | — |
| 605-331 | SIOUX FLS | 9631 | — | — |
| 605-332 | SIOUX FLS | 9631 | — | — |
| 605-333 | SIOUX FLS | 9631 | — | — |
| 605-334 | SIOUX FLS | 9631 | — | — |
| 605-335 | SIOUX FLS | 9631 | — | — |
| 605-336 | SIOUX FLS | 9631 | — | — |
| 605-337 | PLATTE | 1670 | — | — |
| 605-338 | SIOUX FLS | 9631 | — | — |
| 605-339 | SIOUX FLS | 9631 | — | — |
| 605-340 | SPEARFISH | 162G | 2001-02-07 | Yes |
| 605-341 | RAPID CITY | 9631 | — | — |
| 605-342 | RAPID CITY | 9631 | — | — |
| 605-343 | RAPID CITY | 9631 | — | — |
| 605-344 | BELVIDERE | 1659 | — | — |
| 605-345 | WEBSTER | 1651 | — | — |
| 605-346 | SO ELLENDL | 1611 | — | — |
| 605-347 | STURGIS | 9631 | — | Yes |
| 605-348 | RAPID CITY | 9631 | — | — |
| 605-349 | WESTJASPER | 1123 | — | Yes |
| 605-350 | HURON | 6534 | — | — |
| 605-351 | SIOUX FLS | 6569 | — | — |
| 605-352 | HURON | 9631 | — | — |
| 605-353 | HURON | 9631 | — | Yes |
| 605-354 | HURON | 6569 | — | — |
| 605-355 | RAPID CITY | 9631 | — | — |
| 605-356 | ELK POINT | 9631 | — | Yes |
| 605-357 | SIOUX FLS | 9631 | — | — |
| 605-358 | SO FORBES | 1611 | — | — |
| 605-359 | SIOUX FLS | 6569 | — | — |
| 605-360 | SIOUX FLS | 6534 | — | Yes |
| 605-361 | SIOUX FLS | 9631 | — | — |
| 605-362 | SIOUX FLS | 9631 | — | — |
| 605-363 | HUMBOLDT | 1677 | — | — |
| 605-364 | LESTERVL | 1686 | — | — |
| 605-365 | DUPREE | 1647 | — | — |
| 605-366 | SIOUX FLS | 6569 | — | — |
| 605-367 | SIOUX FLS | 9631 | — | — |
| 605-368 | HARISBGTEA | 9631 | — | Yes |
| 605-369 | SPRINGFLD | 1686 | — | — |
| 605-370 | SIOUX FLS | 6534 | 2001-05-11 | Yes |
| 605-371 | SIOUX FLS | 9631 | — | Yes |
| 605-372 | WORTHING | 1652 | — | — |
| 605-373 | SIOUX FLS | 9631 | — | — |
| 605-374 | LEMMON | 1689 | — | — |
| 605-375 | BUFFALO | 1689 | — | — |
| 605-376 | SIOUX FLS | 6701 | — | Yes |
| 605-377 | ABERDEEN | 9631 | — | Yes |
| 605-378 | NOVALENTIN | 9631 | — | — |
| 605-379 | SO NELVIK | 1611 | — | — |
| 605-380 | ABERDEEN | 6534 | — | — |
| 605-381 | RAPID CITY | 6534 | — | — |
| 605-382 | CONDE | 1664 | — | Yes |
| 605-383 | SO GUELPH | 1611 | — | — |
| 605-384 | WAGNER | 1660 | — | — |
| 605-385 | RAPID CITY | 9631 | — | Yes |
| 605-386 | QUINN | 1659 | — | — |
| 605-387 | MENNO | 1686 | — | — |
| 605-388 | RAPID CITY | 9631 | — | Yes |
| 605-389 | RAPID CITY | 6534 | — | Yes |
| 605-390 | RAPID CITY | 6569 | — | — |
| 605-391 | RAPID CITY | 6534 | — | — |
| 605-392 | ORIENT | 1680 | — | — |
| 605-393 | RAPID CITY | 9631 | — | Yes |
| 605-394 | RAPID CITY | 9631 | — | — |
| 605-395 | FERNEY | 1664 | — | Yes |
| 605-396 | COLUMBIA | 1664 | — | Yes |
| 605-397 | GROTON | 1664 | — | Yes |
| 605-398 | SUMMIT | 1674 | — | — |
| 605-399 | RAPID CITY | 9631 | — | — |
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.