BISMARCK — ND
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| QWEST CORPORATION | 9631 | 12 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 7 |
| ONVOY, LLC - ND | 452F | 5 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ND | 6568 | 4 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 2 |