COMCAST IP PHONE, LLC
11 prefixes in 623 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 623-256 | PHOENIX | 318J | — | Yes |
| 623-266 | PHOENIX | 318J | — | — |
| 623-269 | PHOENIX | 318J | 2020-12-09 | Yes |
| 623-270 | PHOENIX | 318J | 2021-03-30 | Yes |
| 623-312 | PHOENIX | 318J | — | Yes |
| 623-322 | PHOENIX | 318J | — | — |
| 623-440 | PHOENIX | 318J | 2018-05-25 | Yes |
| 623-466 | PHOENIX | 318J | — | Yes |
| 623-562 | PHOENIX | 318J | — | Yes |
| 623-594 | PHOENIX | 318J | — | — |
| 623-683 | PHOENIX | 318J | — | 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.