POMONA — CA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC | 6010 | 19 |
| FRONTIER CALIFORNIA INC. | 2319 | 9 |
| T-MOBILE USA, INC. | 6529 | 7 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | 6 |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | 4 |