OCSD PDTN — CA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| PACIFIC BELL | 9740 | 5 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7147 | 2 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | 2 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | 2 |
| COMCAST IP PHONE, LLC | 318J | 1 |