TELEPORT COMMUNICATIONS AMERICA, LLC - AZ
14 prefixes in 520 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 520-239 | TUCSON | 7217 | — | Yes |
| 520-329 | TUCSON | 7217 | 2010-06-28 | Yes |
| 520-478 | AJO | 7217 | 2020-10-27 | Yes |
| 520-837 | TUCSON | 7217 | — | Yes |
| 520-851 | SIERRAVIST | 7217 | 2024-10-22 | Yes |
| 520-852 | SIERRAVIST | 7217 | 2024-10-22 | Yes |
| 520-853 | SIERRAVIST | 7217 | 2024-10-22 | Yes |
| 520-854 | SIERRAVIST | 7217 | 2024-10-22 | Yes |
| 520-855 | SIERRAVIST | 7217 | 2024-10-22 | Yes |
| 520-941 | SIERRAVIST | 7217 | 2023-07-27 | Yes |
| 520-942 | SIERRAVIST | 7217 | 2023-07-27 | Yes |
| 520-943 | SIERRAVIST | 7217 | 2023-07-27 | Yes |
| 520-944 | SIERRAVIST | 7217 | 2023-07-27 | Yes |
| 520-945 | SIERRAVIST | 7217 | 2023-07-27 | 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.