MADISON — OH
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| WINDSTREAM WESTERN RESERVE, INC. | 0666 | 3 |
| LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | 1 |
| ONVOY SPECTRUM, LLC | 624H | 1 |
| T-MOBILE USA, INC. | 6529 | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| WINDSTREAM WESTERN RESERVE, INC. | 0666 | 3 |
| LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | 1 |
| ONVOY SPECTRUM, LLC | 624H | 1 |
| T-MOBILE USA, INC. | 6529 | 1 |