NATIONALCY — CA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| PACIFIC BELL | 9740 | 9 |
| T-MOBILE USA, INC. | 6529 | 8 |
| METROPCS, INC. | 5562 | 5 |
| ONVOY, LLC - CA | 649C | 5 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | 5 |
Data last updated: March 10, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| PACIFIC BELL | 9740 | 9 |
| T-MOBILE USA, INC. | 6529 | 8 |
| METROPCS, INC. | 5562 | 5 |
| ONVOY, LLC - CA | 649C | 5 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | 5 |