DURHAM — NC
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC | 4334 | 82 |
| SUNCOM DBA T-MOBILE USA | 8645 | 16 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC | 6324 | 15 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | 13 |
| PAETEC ITEL, LLC | 829J | 13 |