DETROITZN3 — MI
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| MICHIGAN BELL TEL CO | 9323 | 18 |
| OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | 11 |
| ONVOY, LLCV - MI | 543C | 4 |
| LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | 3 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | 3 |