NumberResearchThousands-blocks in 551-899
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 551-899 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 551 blocks
Most active assignees, all time — NPA 551
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-09-02 | 551-899-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - NJ | 6623 | HASBROKHTS | NJ |
| 2023-09-21 | 551-899-1XXX | 1000–1999 | Assigned | ONVOY, LLC - NJ | 637C | HASBROKHTS | NJ |
| 2023-11-06 | 551-899-2XXX | 2000–2999 | Assigned | CABLEVISION LIGHTPATH, INC. - NJ | 4948 | HASBROKHTS | NJ |
| 2023-03-22 | 551-899-3XXX | 3000–3999 | Assigned | ONVOY, LLC - NJ | 637C | HASBROKHTS | NJ |
| 2021-11-08 | 551-899-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HASBROKHTS | NJ |
| 2021-11-08 | 551-899-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HASBROKHTS | NJ |
| 2023-02-17 | 551-899-6XXX | 6000–6999 | Assigned | ONVOY, LLC - NJ | 637C | HASBROKHTS | NJ |
| 2022-05-24 | 551-899-7XXX | 7000–7999 | Assigned | PEERLESS NETWORK OF NEW JERSEY, LLC - NJ | 264F | HASBROKHTS | NJ |
| 2022-03-08 | 551-899-8XXX | 8000–8999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | HASBROKHTS | NJ |
| 2021-08-13 | 551-899-9XXX | 9000–9999 | Assigned | FRACTEL, LLC | 965H | HASBROKHTS | NJ |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.