PALO ALTO — CA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| PACIFIC BELL | 9740 | 56 |
| NEW CINGULAR WIRELESS PCS, LLC | 6010 | 15 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | 13 |
| T-MOBILE USA, INC. | 6529 | 11 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | 9 |