MADISON — NC
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| BRIGHTSPEED OF NORTH CAROLINA, LLC | 0471 | 3 |
| LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | 1 |
| NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | 1 |
| ONVOY SPECTRUM, LLC | 624H | 1 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | 1 |