LONGMONT — CO
Data last updated: August 31, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| QWEST CORPORATION | 9636 | 14 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 6567 | 10 |
| ONVOY, LLC - CO | 026D | 9 |
| BANDWIDTH.COM CLEC, LLC - CO | 078F | 8 |
| LEVEL 3 COMMUNICATIONS, LLC - CO | 6118 | 6 |