HILLSBORO — ND
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| MIDCONTINENT COMMUNICATIONS - ND | 3065 | 1 |
| HALSTAD TELEPHONE COMPANY - ND | 3796 | 1 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 1 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ND | 6568 | 1 |
| QWEST CORPORATION | 9631 | 1 |