FRONTIER CALIFORNIA INC.
137 prefixes in 310 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 310-587 | SNMN SNMN | 2319 | — | — |
| 310-589 | MALIBU | 2319 | — | Yes |
| 310-636 | SNMN MRVS | 2319 | — | — |
| 310-656 | SNMN SNMN | 2319 | — | — |
| 310-664 | SNMN SNMN | 2319 | — | — |
| 310-737 | SNMN MRVS | 2319 | — | Yes |
| 310-791 | REDONDO | 2319 | — | — |
| 310-792 | REDONDO | 2319 | — | — |
| 310-793 | REDONDO | 2319 | — | Yes |
| 310-794 | W ANGELES | 2319 | — | — |
| 310-796 | REDONDO | 2319 | — | Yes |
| 310-798 | REDONDO | 2319 | — | — |
| 310-802 | REDONDO | 2319 | — | Yes |
| 310-820 | W ANGELES | 2319 | — | — |
| 310-821 | SNMN MRVS | 2319 | — | — |
| 310-822 | SNMN MRVS | 2319 | — | — |
| 310-823 | SNMN MRVS | 2319 | — | — |
| 310-824 | W ANGELES | 2319 | — | Yes |
| 310-825 | W ANGELES | 2319 | — | — |
| 310-826 | W ANGELES | 2319 | — | — |
| 310-827 | SNMN MRVS | 2319 | — | — |
| 310-828 | SNMN SNMN | 2319 | — | — |
| 310-829 | SNMN SNMN | 2319 | — | — |
| 310-866 | SNMN SNMN | 2319 | — | Yes |
| 310-889 | W ANGELES | 2319 | — | Yes |
| 310-899 | SNMN SNMN | 2319 | — | — |
| 310-914 | W ANGELES | 2319 | — | — |
| 310-915 | SNMN MRVS | 2319 | — | — |
| 310-917 | SNMN SNMN | 2319 | — | — |
| 310-921 | REDONDO | 2319 | — | Yes |
| 310-937 | REDONDO | 2319 | — | — |
| 310-939 | REDONDO | 2319 | — | — |
| 310-944 | REDONDO | 2319 | — | Yes |
| 310-966 | W ANGELES | 2319 | — | Yes |
| 310-979 | W ANGELES | 2319 | — | — |
| 310-996 | W ANGELES | 2319 | — | — |
| 310-998 | SNMN SNMN | 2319 | — | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.