CASS CITY — MI
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER NORTH, INC. - MI | 0695 | 1 |
| OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | 1 |
| ONVOY, LLCV - MI | 543C | 1 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 1 |
| INTERACTIVE SERVICES NETWORK, INC. | 817J | 1 |