All assignees
315 prefixes in 551 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 551-400 | CRAGMERE | 637C | 2019-07-19 | Yes |
| 551-401 | UNION CITY | 4036 | 2024-08-22 | Yes |
| 551-402 | RAMSEY | 6391 | 2018-05-10 | Yes |
| 551-403 | BAYONNE | 6623 | 2024-09-18 | Yes |
| 551-404 | HACKENSACK | 6623 | 2002-04-16 | Yes |
| 551-405 | HACKENSACK | 4036 | 2024-09-19 | Yes |
| 551-406 | CLOSTER | 637C | 2024-10-01 | Yes |
| 551-407 | KEARNY | 6623 | 2024-10-02 | Yes |
| 551-408 | DUMONT | 637C | 2024-11-07 | Yes |
| 551-409 | HACKENSACK | 637C | 2024-11-07 | Yes |
| 551-410 | RIDGEWOOD | 637C | 2024-11-08 | Yes |
| 551-411 | XXXXXXXXXX | MULT | — | — |
| 551-412 | HACKENSACK | 4036 | 2024-11-25 | Yes |
| 551-413 | KEARNY | 4036 | 2024-11-25 | Yes |
| 551-414 | JERSEYCITY | 4036 | 2024-12-02 | Yes |
| 551-415 | LEONIA | 637C | 2024-12-13 | Yes |
| 551-416 | CRAGMERE | 637C | 2025-02-06 | Yes |
| 551-417 | JERSEYCITY | 637C | 2025-02-06 | Yes |
| 551-418 | ORADELL | 637C | 2025-02-13 | Yes |
| 551-419 | FAIR LAWN | 6391 | 2025-02-14 | Yes |
| 551-420 | BAYONNE | 6623 | 2025-04-03 | Yes |
| 551-421 | UNION CITY | 4948 | 2025-04-03 | Yes |
| 551-422 | HACKENSACK | 637C | 2025-04-16 | Yes |
| 551-423 | HACKENSACK | 4036 | 2025-05-20 | Yes |
| 551-424 | BAYONNE | 6623 | 2025-06-11 | Yes |
| 551-425 | RAMSEY | 637C | 2025-08-13 | Yes |
| 551-426 | BAYONNE | 6623 | 2025-08-26 | Yes |
| 551-427 | RAMSEY | 6391 | 2001-12-19 | — |
| 551-428 | JERSEYCITY | 6391 | 2025-09-03 | Yes |
| 551-429 | BAYONNE | 6623 | 2025-10-14 | Yes |
| 551-430 | JERSEYCITY | 6623 | — | Yes |
| 551-431 | JERSEYCITY | 4948 | 2025-10-14 | Yes |
| 551-432 | BAYONNE | 6623 | — | Yes |
| 551-433 | HACKENSACK | 700J | 2025-12-05 | Yes |
| 551-434 | BAYONNE | 6623 | 2026-01-05 | Yes |
| 551-435 | BAYONNE | 597F | 2026-03-16 | Yes |
| 551-436 | ENGLEWOOD | 637C | 2026-07-09 | Yes |
| 551-437 | TEANECK | 637C | 2026-07-09 | Yes |
| 551-438 | UNION CITY | 637C | 2026-07-27 | Yes |
| 551-439 | HACKENSACK | 637C | 2026-08-12 | Yes |
| 551-440 | HACKENSACK | 4036 | 2026-09-03 | Yes |
| 551-444 | FAIR LAWN | 6391 | — | Yes |
| 551-449 | HACKENSACK | 6391 | — | Yes |
| 551-451 | CLIFFSIDE | 637C | 2023-01-13 | Yes |
| 551-455 | FAIR LAWN | 637C | 2021-01-26 | Yes |
| 551-465 | LEONIA | 965H | 2020-02-14 | Yes |
| 551-482 | UNION CITY | 4036 | 2002-05-06 | Yes |
| 551-486 | HACKENSACK | 6391 | 2001-12-19 | — |
| 551-497 | HACKENSACK | 6391 | 2005-06-13 | Yes |
| 551-500 | RAMSEY | 637C | — | Yes |
| 551-501 | ENGLEWOOD | 637C | 2020-05-29 | Yes |
| 551-502 | RIDGEWOOD | 4036 | 2017-06-09 | Yes |
| 551-511 | XXXXXXXXXX | MULT | — | — |
| 551-525 | JERSEYCITY | 637C | 2023-10-16 | Yes |
| 551-529 | UNION CITY | 965H | 2020-02-14 | Yes |
| 551-550 | JERSEYCITY | 637C | 2022-03-21 | Yes |
| 551-551 | JERSEYCITY | 637C | 2025-08-19 | Yes |
| 551-552 | CRAGMERE | 637C | 2019-12-17 | Yes |
| 551-553 | ORADELL | 637C | 2022-08-11 | Yes |
| 551-554 | JERSEYCITY | 637C | 2020-02-04 | Yes |
| 551-555 | DIR ASST | MULT | — | — |
| 551-556 | UNION CITY | 6623 | 2002-11-13 | Yes |
| 551-557 | PARK RIDGE | 999H | 2018-09-11 | Yes |
| 551-574 | CLIFFSIDE | 4036 | 2002-04-15 | — |
| 551-579 | RAMSEY | 6391 | 2006-09-21 | Yes |
| 551-580 | KEARNY | 4036 | 2002-05-06 | Yes |
| 551-587 | HACKENSACK | 6623 | 2001-10-17 | Yes |
| 551-588 | RAMSEY | 516J | 2022-02-24 | Yes |
| 551-600 | WYCKOFF | 965H | 2020-05-22 | Yes |
| 551-611 | XXXXXXXXXX | MULT | — | — |
| 551-651 | OAKLAND | 637C | 2021-01-26 | Yes |
| 551-655 | JERSEYCITY | 6391 | 2002-08-02 | Yes |
| 551-666 | BAYONNE | 637C | — | Yes |
| 551-688 | LEONIA | 516J | 2022-02-18 | Yes |
| 551-689 | JERSEYCITY | 6391 | 2005-06-10 | Yes |
| 551-697 | JERSEYCITY | 6391 | 2005-08-12 | Yes |
| 551-700 | — | — | ||
| 551-711 | XXXXXXXXXX | MULT | — | — |
| 551-722 | HASBROKHTS | 6623 | 2017-12-15 | Yes |
| 551-727 | BAYONNE | 516J | 2022-03-04 | Yes |
| 551-733 | RIDGEWOOD | 516J | 2022-03-01 | Yes |
| 551-751 | WESTWOOD | 637C | 2021-01-26 | Yes |
| 551-755 | CLOSTER | 965H | 2021-08-11 | Yes |
| 551-758 | JERSEYCITY | 965H | 2020-02-14 | Yes |
| 551-766 | RUTHERFORD | 516J | 2022-03-01 | Yes |
| 551-775 | HACKENSACK | 118F | 2016-06-24 | Yes |
| 551-777 | RAMSEY | 6391 | — | Yes |
| 551-786 | UNION CITY | 965H | 2020-10-14 | Yes |
| 551-788 | PARK RIDGE | 516J | 2022-02-24 | Yes |
| 551-795 | FAIR LAWN | 6391 | 2006-09-21 | Yes |
| 551-799 | UNION CITY | 516J | 2022-03-04 | Yes |
| 551-800 | WESTWOOD | 637C | — | Yes |
| 551-804 | WYCKOFF | 6623 | 2001-10-18 | Yes |
| 551-811 | XXXXXXXXXX | MULT | — | — |
| 551-815 | RIDGEWOOD | 637C | 2021-01-26 | Yes |
| 551-837 | HACKENSACK | 516J | 2021-03-16 | Yes |
| 551-842 | JERSEYCITY | 965H | 2021-04-01 | Yes |
| 551-866 | CLIFFSIDE | 516J | 2022-02-04 | Yes |
| 551-888 | UNION CITY | 264F | 2012-11-19 | Yes |
| 551-899 | HASBROKHTS | 965H | 2021-08-13 | 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.