MICHIGAN BELL TEL CO
106 prefixes in 517 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 517-203 | LANSING | 9323 | — | Yes |
| 517-205 | JACKSON | 9323 | 2014-04-17 | Yes |
| 517-223 | FOWLERVL | 9323 | — | — |
| 517-241 | LANSING | 9323 | — | — |
| 517-244 | MASON | 9323 | — | Yes |
| 517-253 | LANSING | 9323 | 2013-04-19 | Yes |
| 517-267 | LANSING | 9323 | — | — |
| 517-272 | LANSING | 9323 | — | Yes |
| 517-284 | LANSING | 9323 | 2011-08-11 | Yes |
| 517-316 | LANSING | 9323 | — | Yes |
| 517-321 | LANSING | 9323 | — | — |
| 517-322 | LANSING | 9323 | — | — |
| 517-323 | LANSING | 9323 | — | — |
| 517-324 | LANSING | 9323 | — | — |
| 517-325 | LANSING | 9323 | — | Yes |
| 517-327 | LANSING | 9323 | — | — |
| 517-332 | LANSING | 9323 | — | — |
| 517-333 | LANSING | 9323 | — | — |
| 517-334 | LANSING | 9323 | — | Yes |
| 517-335 | LANSING | 9323 | — | — |
| 517-336 | LANSING | 9323 | — | Yes |
| 517-337 | LANSING | 9323 | — | — |
| 517-339 | LANSING | 9323 | — | — |
| 517-342 | LANSING | 9323 | — | Yes |
| 517-346 | LANSING | 9323 | — | — |
| 517-347 | LANSING | 9323 | — | — |
| 517-349 | LANSING | 9323 | — | — |
| 517-351 | LANSING | 9323 | — | — |
| 517-353 | LANSING | 9323 | — | — |
| 517-355 | LANSING | 9323 | — | — |
| 517-363 | LANSING | 9323 | — | — |
| 517-364 | LANSING | 9323 | — | — |
| 517-367 | LANSING | 9323 | — | — |
| 517-371 | LANSING | 9323 | — | — |
| 517-372 | LANSING | 9323 | — | — |
| 517-373 | LANSING | 9323 | — | — |
| 517-374 | LANSING | 9323 | — | — |
| 517-377 | LANSING | 9323 | — | Yes |
| 517-381 | LANSING | 9323 | — | — |
| 517-393 | LANSING | 9323 | — | — |
| 517-394 | LANSING | 9323 | — | — |
| 517-432 | LANSING | 9323 | — | — |
| 517-437 | HILLSDALE | 9323 | — | — |
| 517-439 | HILLSDALE | 9323 | — | — |
| 517-481 | LANSING | 9323 | — | Yes |
| 517-482 | LANSING | 9323 | — | — |
| 517-483 | LANSING | 9323 | — | Yes |
| 517-484 | LANSING | 9323 | — | — |
| 517-485 | LANSING | 9323 | — | — |
| 517-487 | LANSING | 9323 | — | — |
| 517-529 | CLARKLAKE | 9323 | — | Yes |
| 517-536 | NAPOLEON | 9323 | — | Yes |
| 517-540 | HOWELL | 9323 | — | Yes |
| 517-541 | CHARLOTTE | 9323 | — | Yes |
| 517-543 | CHARLOTTE | 9323 | — | — |
| 517-545 | HOWELL | 9323 | — | — |
| 517-546 | HOWELL | 9323 | — | — |
| 517-548 | HOWELL | 9323 | — | — |
| 517-552 | HOWELL | 9323 | — | — |
| 517-575 | LANSING | 9323 | — | Yes |
| 517-589 | LESLIE | 9323 | — | Yes |
| 517-607 | HILLSDALE | 9323 | — | Yes |
| 517-623 | DANSVILLE | 9323 | — | Yes |
| 517-629 | ALBION | 9323 | — | — |
| 517-630 | ALBION | 9323 | — | Yes |
| 517-636 | LANSING | 9323 | 2001-11-28 | — |
| 517-645 | POTTERVL | 9323 | — | Yes |
| 517-646 | DIMONDALE | 9323 | — | Yes |
| 517-647 | PORTLAND | 9323 | — | Yes |
| 517-649 | MULLIKEN | 9323 | — | Yes |
| 517-663 | EATON RPD | 9323 | — | — |
| 517-664 | LANSING | 9323 | — | Yes |
| 517-676 | MASON | 9323 | — | — |
| 517-694 | HOLT | 9323 | — | — |
| 517-699 | HOLT | 9323 | — | Yes |
| 517-702 | LANSING | 9323 | — | Yes |
| 517-703 | LANSING | 9323 | — | Yes |
| 517-706 | LANSING | 9323 | — | Yes |
| 517-721 | LANSING | 9323 | 2002-03-19 | Yes |
| 517-726 | VERMONTVL | 9323 | — | Yes |
| 517-750 | JACKSON | 9323 | — | Yes |
| 517-763 | LANSING | 9323 | — | Yes |
| 517-764 | JACKSON | 9323 | — | Yes |
| 517-768 | JACKSON | 9323 | — | — |
| 517-769 | JACKSON | 9323 | — | Yes |
| 517-780 | JACKSON | 9323 | — | — |
| 517-782 | JACKSON | 9323 | — | — |
| 517-783 | JACKSON | 9323 | — | — |
| 517-784 | JACKSON | 9323 | — | — |
| 517-787 | JACKSON | 9323 | — | — |
| 517-788 | JACKSON | 9323 | — | — |
| 517-789 | JACKSON | 9323 | — | — |
| 517-796 | JACKSON | 9323 | — | Yes |
| 517-802 | LANSING | 9323 | 2007-07-03 | Yes |
| 517-817 | JACKSON | 9323 | — | Yes |
| 517-840 | JACKSON | 9323 | — | — |
| 517-841 | JACKSON | 9323 | — | — |
| 517-849 | JONESVILLE | 9323 | — | Yes |
| 517-852 | NASHVILLE | 9323 | — | Yes |
| 517-880 | XXXXXXXXXX | 9323 | — | — |
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.