CASTROVL — CA
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | 2 |
| PACIFIC BELL | 9740 | 2 |
| IP HORIZON LLC | 515J | 1 |
| AT&T ENTERPRISES, LLC | 516C | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | 2 |
| PACIFIC BELL | 9740 | 2 |
| IP HORIZON LLC | 515J | 1 |
| AT&T ENTERPRISES, LLC | 516C | 1 |