FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS
26 prefixes in 817 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 817-220 | SPRINGTOWN | 2154 | — | — |
| 817-221 | RENO | 2154 | — | Yes |
| 817-251 | GRAPEVINE | 4344 | — | — |
| 817-270 | AZLE | 4344 | — | Yes |
| 817-305 | GRAPEVINE | 4344 | — | Yes |
| 817-329 | GRAPEVINE | 4344 | — | — |
| 817-337 | KELLER | 4344 | — | — |
| 817-379 | KELLER | 4344 | — | Yes |
| 817-410 | GRAPEVINE | 4344 | — | — |
| 817-416 | GRAPEVINE | 4344 | — | — |
| 817-421 | GRAPEVINE | 4344 | — | — |
| 817-424 | GRAPEVINE | 4344 | — | — |
| 817-431 | KELLER | 4344 | — | — |
| 817-442 | GRAPEVINE | 4344 | — | Yes |
| 817-444 | AZLE | 4344 | — | — |
| 817-481 | GRAPEVINE | 4344 | — | — |
| 817-482 | KELLER | 4344 | — | Yes |
| 817-488 | GRAPEVINE | 4344 | — | — |
| 817-523 | SPRINGTOWN | 2154 | — | Yes |
| 817-562 | KELLER | 4344 | — | Yes |
| 817-677 | RENO | 2154 | — | Yes |
| 817-724 | GRAPEVINE | 4344 | — | Yes |
| 817-778 | GRAPEVINE | 4344 | — | Yes |
| 817-813 | AZLE | 4344 | 2001-02-08 | Yes |
| 817-906 | GRAPEVINE | 4344 | — | — |
| 817-949 | GRAPEVINE | 4344 | — | — |
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.