LEVEL 3 COMMUNICATIONS, LLC - AZ
17 prefixes in 520 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 520-208 | CASAGRANDE | 3285 | 2001-01-08 | Yes |
| 520-223 | NOGALES | 3285 | 2002-04-09 | Yes |
| 520-226 | SIERRAVIST | 3285 | 2002-04-09 | Yes |
| 520-246 | TUCSON | 3285 | 2020-10-30 | Yes |
| 520-254 | WILLCOX | 3285 | 2004-04-02 | Yes |
| 520-314 | TUCSON | 3285 | 2011-02-09 | Yes |
| 520-337 | WILLCOX | 3285 | 2008-05-05 | Yes |
| 520-369 | TUCSON | 3285 | 2011-09-28 | Yes |
| 520-413 | CASAGRANDE | 3285 | 2001-04-16 | Yes |
| 520-414 | CASAGRANDE | 3285 | 2001-04-16 | Yes |
| 520-433 | TUCSON | 3285 | 2012-11-20 | Yes |
| 520-509 | CASAGRANDE | 3285 | 2001-05-15 | Yes |
| 520-542 | TUCSON | 3285 | 2021-08-04 | Yes |
| 520-589 | TUCSON | 3285 | 2015-07-29 | Yes |
| 520-640 | TUCSON | 3285 | 2022-04-15 | Yes |
| 520-681 | NOGALES | 3285 | 2023-06-26 | Yes |
| 520-829 | TUCSON | 3285 | 2001-08-17 | 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.