DENVER — CO
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| QWEST CORPORATION | 9636 | 528 |
| T-MOBILE USA, INC. | 6529 | 163 |
| NEW CINGULAR WIRELESS PCS, LLC | 6010 | 117 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 6567 | 116 |
| LEVEL 3 COMMUNICATIONS, LLC - CO | 6118 | 92 |