DETROITZN1 — MI
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| MICHIGAN BELL TEL CO | 9323 | 77 |
| OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | 15 |
| ONVOY, LLCV - MI | 543C | 8 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | 8 |
| METROPCS, INC. | 5562 | 6 |