ONSTED — MI
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER COMMUNICATIONS OF MICHIGAN, INC. | 4417 | 1 |
| ONVOY, LLCV - MI | 543C | 1 |
| DEERFIELD FARMERS' TELEPHONE COMPANY - MI | 558A | 1 |
| ONVOY SPECTRUM, LLC | 624H | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER COMMUNICATIONS OF MICHIGAN, INC. | 4417 | 1 |
| ONVOY, LLCV - MI | 543C | 1 |
| DEERFIELD FARMERS' TELEPHONE COMPANY - MI | 558A | 1 |
| ONVOY SPECTRUM, LLC | 624H | 1 |