MAD RIVER — CA
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| ONVOY, LLC - CA | 649C | 2 |
| FRONTIER CALIFORNIA INC. | 4420 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| ONVOY, LLC - CA | 649C | 2 |
| FRONTIER CALIFORNIA INC. | 4420 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | 1 |