NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 571
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-04-23 | 571-706-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DALE CITY | VA |
| 2025-04-23 | 571-706-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DALE CITY | VA |
| 2025-04-23 | 571-706-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DALE CITY | VA |
| 2025-04-23 | 571-741-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BRADDOCK | VA |
| 2025-04-23 | 571-741-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BRADDOCK | VA |
| 2025-04-23 | 571-741-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BRADDOCK | VA |
| 2024-04-01 | 571-632-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MANASSAS | VA |
| 2024-04-01 | 571-632-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MANASSAS | VA |
| 2024-04-01 | 571-664-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MANASSAS | VA |
| 2024-04-01 | 571-664-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MANASSAS | VA |
| 2024-03-11 | 571-630-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN17 | VA |
| 2024-03-11 | 571-630-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN17 | VA |
| 2024-03-11 | 571-630-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN17 | VA |
| 2024-03-11 | 571-630-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN17 | VA |
| 2024-03-11 | 571-630-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN17 | VA |
| 2024-03-11 | 571-631-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN19 | VA |
| 2024-03-11 | 571-631-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN19 | VA |
| 2024-03-11 | 571-631-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN19 | VA |
| 2024-03-11 | 571-631-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN19 | VA |
| 2024-03-11 | 571-631-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN19 | VA |
| 2023-07-18 | 571-638-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2023-07-18 | 571-638-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2023-07-18 | 571-638-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2023-07-18 | 571-638-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2023-07-18 | 571-638-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2022-08-12 | 571-563-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2022-08-12 | 571-563-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2022-08-12 | 571-563-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2022-08-12 | 571-563-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2022-08-12 | 571-563-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2022-08-10 | 571-548-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2022-08-10 | 571-548-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2022-08-10 | 571-548-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2022-08-10 | 571-548-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2022-08-10 | 571-548-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2022-04-15 | 571-556-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BRADDOCK | VA |
| 2022-03-28 | 571-548-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2022-03-28 | 571-548-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2022-03-24 | 571-547-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN08 | VA |
| 2022-03-24 | 571-547-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN08 | VA |
| 2022-03-21 | 571-543-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DALE CITY | VA |
| 2022-02-24 | 571-538-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MANASSAS | VA |
| 2022-02-23 | 571-545-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN17 | VA |
| 2022-02-23 | 571-545-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN17 | VA |
| 2022-02-23 | 571-591-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN19 | VA |
| 2022-02-23 | 571-591-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN19 | VA |
| 2022-02-05 | 571-773-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DULLESMTRO | VA |
| 2022-02-04 | 571-877-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | LORTONMTRO | VA |
| 2022-02-04 | 571-877-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | LORTONMTRO | VA |
| 2022-01-31 | 571-543-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DALE CITY | VA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.