ROCKWOOD — MI
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| PAETEC ITEL, LLC | 829J | 2 |
| ONVOY, LLCV - MI | 543C | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | 1 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | 1 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | 1 |