ANN ARBOR — MI
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| MICHIGAN BELL TEL CO | 9323 | 38 |
| OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | 19 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 15 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | 13 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | 7 |