GRANDFORKS — ND
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| QWEST CORPORATION | 9631 | 10 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 7 |
| AERIAL COMMUNICATIONS, INC. | 6701 | 3 |
| LEVEL 3 COMMUNICATIONS, LLC - ND | 8054 | 3 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ND | 6568 | 2 |