CALIFORNIA — PA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | 2 |
| BANDWIDTH.COM CLEC, LLC - PA | 002F | 1 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | 1 |
| VERIZON PENNSYLVANIA, INC. | 9208 | 1 |