WALNUT GRV — CA
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| T-MOBILE USA, INC. | 6529 | 2 |
| FRACTEL, LLC | 965H | 2 |
| CITIZENS TELECOM CA. DBA FRONTIER COM OF CA | 2308 | 1 |
| CENTURYLINK COMMUNICATIONS, LLC | 508J | 1 |
| NEW CINGULAR WIRELESS PCS, LLC | 6010 | 1 |