MULTIPLE OCN LISTING
11 prefixes in 551 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 551-211 | XXXXXXXXXX | MULT | — | — |
| 551-311 | XXXXXXXXXX | MULT | — | — |
| 551-411 | XXXXXXXXXX | MULT | — | — |
| 551-511 | XXXXXXXXXX | MULT | — | — |
| 551-555 | DIR ASST | MULT | — | — |
| 551-611 | XXXXXXXXXX | MULT | — | — |
| 551-711 | XXXXXXXXXX | MULT | — | — |
| 551-811 | XXXXXXXXXX | MULT | — | — |
| 551-911 | XXXXXXXXXX | MULT | — | — |
| 551-976 | XXXXXXXXXX | MULT | — | — |
| 551-990 | XXXXXXXXXX | MULT | 2002-03-06 | — |
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.