MONTROSE — MI
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| BRIGHTSPEED OF CENTRAL MICHIGAN, INC | 0671 | 1 |
| COMCAST IP PHONE, LLC | 318J | 1 |
| ONVOY, LLCV - MI | 543C | 1 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | 1 |
| TELNET WORLDWIDE, INC. | 817J | 1 |