All assignees
759 prefixes in 605 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 605-400 | SIOUX FLS | 6534 | 2007-08-20 | — |
| 605-401 | SIOUX FLS | 515J | 2021-03-02 | Yes |
| 605-403 | SIOUX FLS | 425J | 2019-05-29 | Yes |
| 605-404 | SIOUX FLS | 9631 | 2017-03-23 | Yes |
| 605-405 | ARLINGTON | 162G | 2021-06-10 | Yes |
| 605-407 | MARTIN | 6534 | 2009-03-02 | Yes |
| 605-408 | HARISBGTEA | 6534 | 2003-05-27 | Yes |
| 605-409 | HARISBGTEA | 6569 | 2020-11-18 | Yes |
| 605-410 | IPSWICH | 7076 | 2017-08-02 | Yes |
| 605-411 | XXXXXXXXXX | MULT | — | — |
| 605-412 | HURON | 6534 | 2009-03-11 | Yes |
| 605-413 | SIOUX FLS | 5180 | 2002-06-19 | Yes |
| 605-414 | CASTLEWOOD | 920F | 2010-08-04 | Yes |
| 605-415 | RAPID CITY | 5180 | 2002-06-19 | Yes |
| 605-416 | RAPID CITY | 6569 | 2021-06-11 | Yes |
| 605-417 | FTTHOMPSON | 424F | 2017-03-03 | Yes |
| 605-418 | ABERDEEN | 6701 | 2021-04-15 | Yes |
| 605-419 | SISSETON | 6569 | 2014-11-25 | Yes |
| 605-420 | ROSLYN | 7076 | 2016-02-02 | Yes |
| 605-421 | SALEM | 6569 | — | Yes |
| 605-422 | NOSIOUX CY | 7010 | — | — |
| 605-423 | STURGIS | 9631 | — | Yes |
| 605-424 | ORAL | 1659 | — | — |
| 605-425 | SALEM | 1669 | — | — |
| 605-426 | IPSWICH | 1685 | — | — |
| 605-427 | MADISON | 7024 | — | — |
| 605-428 | DELLRAPIDS | 1677 | — | Yes |
| 605-429 | NOCROOKSTN | 1577 | — | — |
| 605-430 | RAPID CITY | 6569 | — | — |
| 605-431 | RAPID CITY | 6569 | — | — |
| 605-432 | MILBANK | 9631 | — | Yes |
| 605-433 | INTERIOR | 1659 | — | — |
| 605-434 | MILBANK | 683C | 2005-06-15 | — |
| 605-435 | WAUBAY | 7076 | 2004-04-23 | Yes |
| 605-436 | SENECA | 1680 | — | — |
| 605-437 | HERREID | 1685 | — | — |
| 605-438 | MILBANK | 907D | 2006-05-12 | — |
| 605-439 | LEOLA | 1685 | — | — |
| 605-440 | CUSTER | 6534 | 2001-09-14 | Yes |
| 605-441 | MARTIN | 6534 | 2001-09-14 | — |
| 605-442 | TOLSTOY | 1680 | — | — |
| 605-443 | SPEARFISH | 7076 | — | Yes |
| 605-444 | SIOUX FLS | 7076 | 2006-08-31 | — |
| 605-445 | MILBANK | 7076 | 2005-07-21 | — |
| 605-446 | COLTON | 1677 | — | Yes |
| 605-447 | ONAKA | 1680 | — | — |
| 605-448 | BRITTON | 1680 | — | — |
| 605-449 | EMERY | 1669 | — | — |
| 605-450 | REDFIELD | 6569 | — | Yes |
| 605-451 | WAKONDA | 7076 | 2007-10-09 | — |
| 605-452 | WOOD | 1659 | — | — |
| 605-453 | MILLER | 6569 | 2016-12-23 | Yes |
| 605-454 | MARTIN | 6534 | 2004-12-03 | Yes |
| 605-455 | KYLE | 1659 | — | — |
| 605-456 | NEWELL | 1689 | — | — |
| 605-457 | CREIGHTON | 1659 | — | — |
| 605-458 | WESSINGTON | 1680 | — | — |
| 605-459 | ARDMORE | 1659 | — | — |
| 605-460 | REDFIELD | 6534 | — | Yes |
| 605-461 | HURON | 6569 | — | Yes |
| 605-462 | LONGVALLEY | 1659 | — | — |
| 605-463 | TABOR | 1660 | — | — |
| 605-464 | TYNDALL | 6569 | — | Yes |
| 605-465 | CROOKS | 7076 | 2009-08-17 | — |
| 605-466 | ISABEL | 1647 | — | — |
| 605-467 | MILBANK | 6569 | 2004-08-11 | Yes |
| 605-468 | REDFIELD | 6569 | — | Yes |
| 605-469 | LAKE ANDES | 6569 | — | Yes |
| 605-470 | BRITTON | 6534 | 2006-07-06 | Yes |
| 605-471 | SALEM | 6569 | — | Yes |
| 605-472 | REDFIELD | 9631 | — | Yes |
| 605-473 | RELIANCE | 1686 | — | — |
| 605-474 | NLARCHWOOD | 280D | — | — |
| 605-475 | REDFIELD | 6125 | 2005-09-13 | Yes |
| 605-476 | SIOUX FLS | 700J | 2025-08-08 | Yes |
| 605-477 | FTTHOMPSON | 424F | 2009-06-17 | — |
| 605-478 | HIGHMORE | 6534 | 2005-04-22 | Yes |
| 605-479 | WHENDRICKS | 1654 | — | — |
| 605-480 | MADISON | 6534 | — | Yes |
| 605-481 | LAKE ANDES | 6569 | — | Yes |
| 605-482 | OLDHAMRMON | 1657 | — | — |
| 605-483 | WENTWORTH | 1651 | — | — |
| 605-484 | RAPID CITY | 6569 | — | — |
| 605-485 | WINFRED | 1669 | — | — |
| 605-486 | ROSLYN | 1680 | — | — |
| 605-487 | LAKE ANDES | 1660 | — | — |
| 605-488 | KADOKA | 6569 | 2003-10-09 | Yes |
| 605-489 | CHESTER | 1651 | — | — |
| 605-490 | STURGIS | 6569 | — | Yes |
| 605-491 | LAKE ANDES | 6534 | — | Yes |
| 605-492 | BRISTOL | 1664 | — | Yes |
| 605-493 | LANGFORD | 1680 | — | — |
| 605-494 | PIERRE | 7076 | 2007-03-05 | — |
| 605-495 | FORESTBURG | 1676 | — | — |
| 605-496 | SIOUX FLS | 162G | 2008-12-17 | Yes |
| 605-497 | WOLSEY | 7076 | 2007-09-25 | — |
| 605-498 | HARISBGTEA | 7024 | — | — |
| 605-499 | STURGIS | 6569 | — | Yes |
| 605-500 | YANKTON | 6534 | 2006-12-04 | — |
| 605-501 | SIOUX FLS | 071J | 2019-11-19 | 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.