RIALTO — CA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| PACIFIC BELL | 9740 | 8 |
| METROPCS NETWORKS, LLC | 899D | 5 |
| BANDWIDTH.COM CLEC, LLC - CA | 981E | 5 |
| ONVOY, LLC - CA | 649C | 4 |
| T-MOBILE USA, INC. | 6529 | 3 |
Data last updated: March 10, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| PACIFIC BELL | 9740 | 8 |
| METROPCS NETWORKS, LLC | 899D | 5 |
| BANDWIDTH.COM CLEC, LLC - CA | 981E | 5 |
| ONVOY, LLC - CA | 649C | 4 |
| T-MOBILE USA, INC. | 6529 | 3 |