All assignees
799 prefixes in 248 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 248-501 | SOUTHFIELD | 9323 | — | — |
| 248-502 | BIRMINGHAM | 7279 | — | — |
| 248-503 | SOUTHFIELD | 9323 | — | — |
| 248-504 | NORTHVILLE | 6120 | — | Yes |
| 248-505 | PONTIAC | 6003 | — | — |
| 248-506 | ROYAL OAK | 5562 | — | Yes |
| 248-507 | CLARKSTON | 6003 | — | Yes |
| 248-508 | SOUTHFIELD | 6003 | — | Yes |
| 248-509 | TROY | 543C | — | Yes |
| 248-510 | SOUTHFIELD | 6003 | 2022-05-24 | Yes |
| 248-511 | XXXXXXXXXX | MULT | — | — |
| 248-512 | PONTIAC | 9323 | — | — |
| 248-513 | NORTHVILLE | 6003 | 2011-07-15 | Yes |
| 248-514 | SOUTHFIELD | 6003 | — | — |
| 248-515 | TROY | 6003 | — | — |
| 248-516 | FARMINGTON | 516C | 2014-09-23 | Yes |
| 248-517 | FARMINGTON | 6534 | 2023-06-13 | Yes |
| 248-518 | CLARKSTON | 508J | 2014-03-05 | Yes |
| 248-519 | TROY | 829J | — | Yes |
| 248-520 | PONTIAC | 6003 | — | — |
| 248-521 | SOUTHFIELD | 5562 | — | Yes |
| 248-522 | FARMINGTON | 6120 | — | Yes |
| 248-523 | FARMINGTON | 9748 | — | — |
| 248-524 | TROY | 9323 | — | — |
| 248-525 | TROY | 2964 | 2009-04-29 | Yes |
| 248-526 | TROY | 9323 | — | — |
| 248-527 | PONTIAC | 9748 | — | — |
| 248-528 | TROY | 9323 | — | Yes |
| 248-529 | MILFDWH LK | 770E | — | Yes |
| 248-530 | BIRMINGHAM | 829J | — | — |
| 248-531 | HOLLY | 829J | — | Yes |
| 248-532 | ORTONVILLE | 6003 | 2014-04-09 | Yes |
| 248-533 | NORTHVILLE | 6003 | — | Yes |
| 248-534 | HOLLY | 6120 | — | Yes |
| 248-535 | PONTIAC | 6003 | — | — |
| 248-536 | FARMINGTON | 829J | — | Yes |
| 248-537 | AUBURN HTS | 829J | — | Yes |
| 248-538 | W BLOOMFLD | 9323 | — | — |
| 248-539 | W BLOOMFLD | 9323 | — | — |
| 248-540 | BIRMINGHAM | 9323 | — | — |
| 248-541 | ROYAL OAK | 9323 | — | — |
| 248-542 | ROYAL OAK | 9323 | — | — |
| 248-543 | ROYAL OAK | 9323 | — | — |
| 248-544 | ROYAL OAK | 9323 | — | — |
| 248-545 | ROYAL OAK | 9323 | — | — |
| 248-546 | ROYAL OAK | 9323 | — | — |
| 248-547 | ROYAL OAK | 9323 | — | — |
| 248-548 | ROYAL OAK | 9323 | — | — |
| 248-549 | ROYAL OAK | 9323 | — | — |
| 248-550 | BIRMINGHAM | 6534 | 2014-06-17 | Yes |
| 248-551 | ROYAL OAK | 9323 | — | — |
| 248-552 | SOUTHFIELD | 9323 | — | — |
| 248-553 | FARMINGTON | 9323 | — | — |
| 248-554 | ROYAL OAK | 9323 | — | Yes |
| 248-555 | DIR ASST | MULT | — | — |
| 248-556 | ROYAL OAK | 829J | 2005-03-14 | Yes |
| 248-557 | SOUTHFIELD | 9323 | — | — |
| 248-558 | CLARKSTON | 2964 | 2011-08-05 | Yes |
| 248-559 | SOUTHFIELD | 9323 | — | — |
| 248-560 | WALLEDLAKE | 829J | — | Yes |
| 248-561 | TROY | 6003 | — | — |
| 248-562 | W BLOOMFLD | 6120 | — | Yes |
| 248-563 | PONTIAC | 6003 | — | — |
| 248-564 | AUBURN HTS | 7279 | — | Yes |
| 248-565 | ROYAL OAK | 6120 | — | Yes |
| 248-566 | BIRMINGHAM | 6120 | — | Yes |
| 248-567 | NORTHVILLE | 7279 | — | Yes |
| 248-568 | PONTIAC | 6003 | — | — |
| 248-569 | SOUTHFIELD | 9323 | — | — |
| 248-570 | PONTIAC | 9748 | — | — |
| 248-571 | ROYAL OAK | 6534 | 2014-09-10 | Yes |
| 248-572 | OXFORD | 770E | — | Yes |
| 248-573 | SOUTH LYON | 770E | — | Yes |
| 248-574 | WALLEDLAKE | 046L | 2007-08-23 | Yes |
| 248-575 | CLARKSTON | 7279 | — | Yes |
| 248-576 | PONTIAC | 9323 | — | — |
| 248-577 | ROYAL OAK | 9323 | — | — |
| 248-578 | NORTHVILLE | 6630 | — | — |
| 248-579 | FARMINGTON | 6120 | — | Yes |
| 248-580 | PONTIAC | 6630 | — | — |
| 248-581 | ROYAL OAK | 7279 | — | Yes |
| 248-582 | ROYAL OAK | 9323 | — | Yes |
| 248-583 | ROYAL OAK | 9323 | — | — |
| 248-584 | ROYAL OAK | 9323 | — | — |
| 248-585 | ROYAL OAK | 9323 | — | — |
| 248-586 | ROYAL OAK | 9323 | — | Yes |
| 248-587 | SOUTH LYON | 829J | — | Yes |
| 248-588 | ROYAL OAK | 9323 | — | — |
| 248-589 | ROYAL OAK | 9323 | — | — |
| 248-590 | BIRMINGHAM | 770E | 2015-11-06 | Yes |
| 248-591 | ROYAL OAK | 9323 | — | Yes |
| 248-592 | W BLOOMFLD | 9323 | — | Yes |
| 248-593 | BIRMINGHAM | 9323 | — | — |
| 248-594 | BIRMINGHAM | 9323 | — | — |
| 248-595 | SOUTHFIELD | 9714 | 2006-05-01 | Yes |
| 248-596 | NORTHVILLE | 9323 | — | — |
| 248-597 | ROYAL OAK | 9323 | — | — |
| 248-598 | AUBURN HTS | 6120 | — | Yes |
| 248-599 | DRAYTON PL | 770E | 2005-11-16 | Yes |
| 248-600 | PONTIAC | 543C | 2015-08-17 | 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.