CLAREMONT — CA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER CALIFORNIA INC. | 2319 | 20 |
| T-MOBILE USA, INC. | 6529 | 7 |
| ONVOY, LLC - CA | 649C | 5 |
| BANDWIDTH.COM CLEC, LLC - CA | 981E | 4 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | 3 |