MASON — OH
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| BRIGHTSPEED OF NORTHWEST OHIO, INC. | 0661 | 7 |
| ONVOY, LLC - OH | 464C | 4 |
| CINCINNATI BELL EXTENDED TERRITORIES LLC - OH | 309B | 3 |
| LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | 2 |
| LEVEL 3 TELECOM OF OHIO, LLC - OH | 7460 | 2 |