ROCK — MI
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| BARAGA TELEPHONE COMPANY | 4253 | 1 |
| TELNET WORLDWIDE, INC. | 4632 | 1 |
| ONVOY, LLCV - MI | 543C | 1 |
| MICHIGAN BELL TEL CO | 9323 | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| BARAGA TELEPHONE COMPANY | 4253 | 1 |
| TELNET WORLDWIDE, INC. | 4632 | 1 |
| ONVOY, LLCV - MI | 543C | 1 |
| MICHIGAN BELL TEL CO | 9323 | 1 |