NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/23/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 551
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-04-22 | 551-383-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ORADELL | NJ |
| 2024-04-22 | 551-383-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ORADELL | NJ |
| 2023-07-18 | 551-371-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JERSEYCITY | NJ |
| 2023-07-18 | 551-371-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JERSEYCITY | NJ |
| 2023-07-18 | 551-371-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JERSEYCITY | NJ |
| 2023-07-18 | 551-371-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JERSEYCITY | NJ |
| 2023-07-18 | 551-371-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JERSEYCITY | NJ |
| 2022-02-24 | 551-320-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | RUTHERFORD | NJ |
| 2022-02-24 | 551-343-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BAYONNE | NJ |
| 2022-02-24 | 551-343-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BAYONNE | NJ |
| 2022-02-23 | 551-329-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | RIDGEWOOD | NJ |
| 2022-02-23 | 551-866-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CLIFFSIDE | NJ |
| 2022-02-23 | 551-866-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CLIFFSIDE | NJ |
| 2022-02-23 | 551-946-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HACKENSACK | NJ |
| 2022-02-21 | 551-347-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | UNION CITY | NJ |
| 2022-02-21 | 551-347-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | UNION CITY | NJ |
| 2022-02-21 | 551-349-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JERSEYCITY | NJ |
| 2022-02-21 | 551-349-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JERSEYCITY | NJ |
| 2022-02-18 | 551-321-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | PARK RIDGE | NJ |
| 2022-02-18 | 551-348-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | LEONIA | NJ |
| 2022-01-14 | 551-322-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TEANECK | NJ |
| 2022-01-14 | 551-322-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TEANECK | NJ |
| 2022-01-14 | 551-332-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BAYONNE | NJ |
| 2022-01-14 | 551-332-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BAYONNE | NJ |
| 2022-01-14 | 551-337-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HACKENSACK | NJ |
| 2022-01-14 | 551-337-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HACKENSACK | NJ |
| 2022-01-14 | 551-338-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JERSEYCITY | NJ |
| 2022-01-14 | 551-341-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | FAIR LAWN | NJ |
| 2022-01-14 | 551-341-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | FAIR LAWN | NJ |
| 2022-01-14 | 551-366-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ENGLEWOOD | NJ |
| 2022-01-14 | 551-366-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ENGLEWOOD | NJ |
| 2022-01-07 | 551-338-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JERSEYCITY | NJ |
| 2022-01-07 | 551-338-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JERSEYCITY | NJ |
| 2022-01-07 | 551-351-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CRAGMERE | NJ |
| 2022-01-07 | 551-351-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CRAGMERE | NJ |
| 2021-12-22 | 551-315-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | RAMSEY | NJ |
| 2021-12-22 | 551-651-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | OAKLAND | NJ |
| 2021-12-22 | 551-651-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | OAKLAND | NJ |
| 2021-12-21 | 551-320-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | RUTHERFORD | NJ |
| 2021-12-21 | 551-320-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | RUTHERFORD | NJ |
| 2021-12-21 | 551-334-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KEARNY | NJ |
| 2021-12-21 | 551-334-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KEARNY | NJ |
| 2021-11-09 | 551-322-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TEANECK | NJ |
| 2021-11-09 | 551-322-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TEANECK | NJ |
| 2021-11-09 | 551-324-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WESTWOOD | NJ |
| 2021-11-09 | 551-324-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WESTWOOD | NJ |
| 2021-11-09 | 551-955-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WYCKOFF | NJ |
| 2021-11-09 | 551-955-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WYCKOFF | NJ |
| 2021-11-08 | 551-755-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CLOSTER | NJ |
| 2021-11-08 | 551-755-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CLOSTER | NJ |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.