All assignees
639 prefixes in 517 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 517-401 | MORENCI | 6534 | — | Yes |
| 517-402 | LANSING | 2964 | — | — |
| 517-403 | ADRIAN | 2964 | — | Yes |
| 517-404 | HOWELL | 5562 | — | Yes |
| 517-407 | JONESVILLE | 9748 | — | — |
| 517-408 | DIMONDALE | 318J | 2007-04-12 | Yes |
| 517-409 | BLISSFIELD | 506J | — | Yes |
| 517-410 | LANSING | 2964 | — | Yes |
| 517-411 | XXXXXXXXXX | MULT | — | — |
| 517-412 | GRANDLEDGE | 770E | 2010-05-26 | Yes |
| 517-414 | JACKSON | 2964 | — | Yes |
| 517-416 | JACKSON | 6003 | 2001-10-01 | Yes |
| 517-417 | ADRIAN | 3459 | — | — |
| 517-418 | HOMER | 6534 | — | Yes |
| 517-420 | LANSING | 6003 | — | — |
| 517-423 | TECUMSEH | 0695 | — | — |
| 517-424 | TECUMSEH | 0695 | — | Yes |
| 517-425 | HILLSDALE | 6003 | — | Yes |
| 517-426 | MUNITH | 516J | 2022-02-22 | Yes |
| 517-427 | RIVES JCT | 516J | 2022-02-24 | Yes |
| 517-428 | FOWLERVL | 2964 | 2019-01-23 | Yes |
| 517-429 | HUDSON | 508J | 2014-03-12 | Yes |
| 517-431 | TIPTON | 0695 | — | Yes |
| 517-432 | LANSING | 9323 | — | — |
| 517-435 | JACKSON | 6003 | 2013-10-04 | Yes |
| 517-436 | SAND CREEK | 0725 | — | Yes |
| 517-437 | HILLSDALE | 9323 | — | — |
| 517-438 | ADRIAN | 6003 | — | Yes |
| 517-439 | HILLSDALE | 9323 | — | — |
| 517-440 | LANSING | 478J | 2021-12-02 | Yes |
| 517-441 | EATON RPD | 6120 | — | Yes |
| 517-442 | ADRIAN | 6534 | — | Yes |
| 517-443 | OGDEN CTR | 0714 | — | Yes |
| 517-444 | CHARLOTTE | 7157 | 2005-03-16 | Yes |
| 517-445 | CLAYTON | 0672 | — | Yes |
| 517-446 | ONSTED | 558A | — | Yes |
| 517-447 | DEERFIELD | 0691 | — | Yes |
| 517-448 | HUDSON | 0695 | — | Yes |
| 517-449 | LANSING | 6003 | — | — |
| 517-451 | BRITTON | 0695 | — | Yes |
| 517-455 | LANSING | 829J | 2005-08-18 | Yes |
| 517-456 | CLINTON | 0695 | — | Yes |
| 517-457 | TIPTON | 933G | 2014-05-30 | Yes |
| 517-458 | MORENCI | 0681 | — | Yes |
| 517-459 | PARMA | 6120 | 2009-11-17 | Yes |
| 517-462 | COLDWATER | 6003 | 2004-04-19 | Yes |
| 517-464 | JACKSON | 9748 | — | — |
| 517-465 | ALBION | 516C | 2009-12-22 | Yes |
| 517-466 | DANSVILLE | 7157 | 2005-02-11 | Yes |
| 517-467 | ONSTED | 4417 | — | Yes |
| 517-468 | BELL OAK | 0726 | — | Yes |
| 517-470 | TECUMSEH | 3459 | — | — |
| 517-471 | ONONDAGA | 597F | 2026-07-24 | Yes |
| 517-474 | JACKSON | 6534 | — | Yes |
| 517-477 | HOLT | 6534 | 2004-12-20 | Yes |
| 517-480 | STOCKBDG | 6534 | — | Yes |
| 517-481 | LANSING | 9323 | — | Yes |
| 517-482 | LANSING | 9323 | — | — |
| 517-483 | LANSING | 9323 | — | Yes |
| 517-484 | LANSING | 9323 | — | — |
| 517-485 | LANSING | 9323 | — | — |
| 517-486 | BLISSFIELD | 0695 | — | Yes |
| 517-487 | LANSING | 9323 | — | — |
| 517-488 | LANSING | 829J | 2005-02-07 | Yes |
| 517-489 | LANSING | 543C | 2010-04-02 | Yes |
| 517-490 | LANSING | 2964 | 2002-08-13 | Yes |
| 517-492 | LANSING | 543C | — | Yes |
| 517-494 | ALBION | 6534 | — | Yes |
| 517-499 | JACKSON | 6003 | — | Yes |
| 517-500 | SUNFIELD | 543C | 2018-09-25 | Yes |
| 517-502 | HUDSON | 3459 | — | — |
| 517-504 | MORENCI | 3459 | — | — |
| 517-505 | LANSING | 2964 | — | — |
| 517-507 | LANSING | 6120 | — | Yes |
| 517-510 | CLAYTON | 543C | 2021-05-19 | Yes |
| 517-511 | XXXXXXXXXX | MULT | — | — |
| 517-512 | LANSING | 6003 | — | Yes |
| 517-513 | JACKSON | 6003 | — | Yes |
| 517-514 | CLINTON | 5562 | 2021-06-23 | Yes |
| 517-515 | LANSING | 6534 | 2008-03-10 | Yes |
| 517-516 | ONSTED | 624H | 2021-05-19 | Yes |
| 517-517 | — | — | ||
| 517-518 | HOWELL | 6534 | 2002-08-23 | Yes |
| 517-519 | HUDSON | 817J | 2001-11-13 | — |
| 517-521 | WEBBERVL | 0681 | — | Yes |
| 517-522 | GRASS LAKE | 0695 | — | Yes |
| 517-523 | OSSEO | 4417 | — | — |
| 517-524 | CONCORD | 4417 | — | — |
| 517-525 | MASON | 6003 | — | — |
| 517-526 | PORTLAND | 6003 | — | Yes |
| 517-528 | LANSING | 2964 | 2010-08-05 | Yes |
| 517-529 | CLARKLAKE | 9323 | — | Yes |
| 517-531 | PARMA | 0681 | — | Yes |
| 517-534 | JACKSON | 6630 | — | — |
| 517-536 | NAPOLEON | 9323 | — | Yes |
| 517-537 | HOWELL | 543C | 2021-05-19 | Yes |
| 517-539 | JACKSON | 6003 | 2015-03-13 | Yes |
| 517-540 | HOWELL | 9323 | — | Yes |
| 517-541 | CHARLOTTE | 9323 | — | Yes |
| 517-542 | LITCHFIELD | 0671 | — | — |
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.