DILLON — CO
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| QWEST CORPORATION | 9636 | 7 |
| METROPCS, INC. | 5562 | 3 |
| LEVEL 3 COMMUNICATIONS, LLC - CO | 6118 | 3 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 6567 | 3 |
| NEW CINGULAR WIRELESS PCS, LLC | 6010 | 1 |