CASSOPOLIS — MI
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER NORTH, INC. - MI | 0695 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | 1 |
| ONVOY SPECTRUM, LLC | 624H | 1 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER NORTH, INC. - MI | 0695 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | 1 |
| ONVOY SPECTRUM, LLC | 624H | 1 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 1 |