GREELEY — CO
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| QWEST CORPORATION | 9636 | 18 |
| T-MOBILE USA, INC. | 6529 | 11 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 6567 | 11 |
| ONVOY, LLC - CO | 026D | 5 |
| NEW CINGULAR WIRELESS PCS, LLC | 6010 | 5 |