CALIFORNCY — CA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC | 6010 | 6 |
| FRONTIER CALIFORNIA INC. | 4420 | 1 |
| TON80 COMMUNICATIONS, LLC | 516J | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | 1 |
| BANDWIDTH.COM CLEC, LLC - CA | 981E | 1 |