CHALLENGE — CA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| CEBRIDGE TELECOM CA, LLC DBA SUDDENLINK COMMS - CA | 388E | 1 |
| ONVOY, LLC - CA | 649C | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | 1 |
| PACIFIC BELL | 9740 | 1 |
Data last updated: March 10, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| CEBRIDGE TELECOM CA, LLC DBA SUDDENLINK COMMS - CA | 388E | 1 |
| ONVOY, LLC - CA | 649C | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | 1 |
| PACIFIC BELL | 9740 | 1 |