LEVEL 3 COMMUNICATIONS, LLC - AZ
10 prefixes in 623 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 623-231 | PHOENIX | 3285 | 2018-03-29 | Yes |
| 623-242 | PHOENIX | 3285 | 2006-01-05 | Yes |
| 623-252 | PHOENIX | 3285 | 2007-09-07 | Yes |
| 623-253 | PHOENIX | 3285 | 2020-01-07 | Yes |
| 623-259 | PHOENIX | 3285 | 2019-06-14 | Yes |
| 623-274 | PHOENIX | 3285 | 2021-10-07 | Yes |
| 623-455 | PHOENIX | 3285 | 2004-12-27 | Yes |
| 623-505 | PHOENIX | 3285 | — | Yes |
| 623-738 | PHOENIX | 3285 | 2009-05-19 | Yes |
| 623-748 | PHOENIX | 3285 | 2002-04-19 | 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.