LEVEL 3 TELECOM OF ARIZONA, LLC - AZ
12 prefixes in 520 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 520-202 | TUCSON | 7552 | — | — |
| 520-351 | TUCSON | 7552 | 2005-10-11 | Yes |
| 520-382 | TUCSON | 7552 | — | Yes |
| 520-495 | TUCSON | 7552 | — | Yes |
| 520-545 | TUCSON | 7552 | — | — |
| 520-547 | TUCSON | 7552 | — | — |
| 520-582 | CASAGRANDE | 7552 | — | Yes |
| 520-618 | TUCSON | 7552 | — | Yes |
| 520-694 | TUCSON | 7552 | — | — |
| 520-777 | TUCSON | 7552 | 2004-10-27 | Yes |
| 520-895 | SIERRAVIST | 7552 | — | Yes |
| 520-901 | TUCSON | 7552 | — | 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.