GREGORY — MI
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| INTERACTIVE SERVICES NETWORK, INC. | 817J | 2 |
| FRONTIER MIDSTATES, INC. - MI | 0681 | 1 |
| TON80 COMMUNICATIONS, LLC | 516J | 1 |
| ONVOY SPECTRUM, LLC | 624H | 1 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | 1 |