TRONA — CA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER CALIFORNIA INC. | 4420 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | 1 |
| FRACTEL, LLC | 965H | 1 |
| RACE TELECOMMUNICATIONS, INC. - CA | 973E | 1 |
Data last updated: March 10, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER CALIFORNIA INC. | 4420 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | 1 |
| FRACTEL, LLC | 965H | 1 |
| RACE TELECOMMUNICATIONS, INC. - CA | 973E | 1 |