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 531
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-12-03 | 531-223-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HOWELLS | NE |
| 2024-11-27 | 531-227-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CLARKSON | NE |
| 2024-11-20 | 531-216-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SCHUYLER | NE |
| 2024-11-20 | 531-286-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | OAKLAND | NE |
| 2024-11-20 | 531-304-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | PENDER | NE |
| 2024-11-20 | 531-900-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WEST POINT | NE |
| 2024-06-18 | 531-369-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SYRACUSE | NE |
| 2024-05-09 | 531-368-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SHELBY | NE |
| 2024-04-05 | 531-362-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BEATRICE | NE |
| 2024-04-05 | 531-364-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GENEVA | NE |
| 2024-02-16 | 531-261-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WEEPINGWTR | NE |
| 2024-02-16 | 531-302-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TECUMSEH | NE |
| 2024-02-16 | 531-312-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TAMORA | NE |
| 2024-02-16 | 531-318-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WILBER | NE |
| 2024-02-16 | 531-327-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WESTERN | NE |
| 2024-02-16 | 531-353-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WAHOO | NE |
| 2024-02-16 | 531-455-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TALMAGE | NE |
| 2024-02-16 | 531-459-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | UTICA | NE |
| 2024-02-14 | 531-217-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | PLATTSMTH | NE |
| 2024-02-14 | 531-246-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SUPERIOR | NE |
| 2024-02-14 | 531-266-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | RUSKIN | NE |
| 2024-02-14 | 531-285-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SHICKLEY | NE |
| 2024-02-13 | 531-253-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | OTOE | NE |
| 2024-02-13 | 531-260-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NEHAWKA | NE |
| 2024-02-13 | 531-276-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MILFORD | NE |
| 2024-02-13 | 531-294-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NEBRASKACY | NE |
| 2024-02-13 | 531-306-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MURRAY | NE |
| 2024-02-13 | 531-331-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MARTELL | NE |
| 2024-02-13 | 531-332-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | OSCEOLA | NE |
| 2024-02-13 | 531-334-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | OHIOWA | NE |
| 2024-02-13 | 531-342-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ONG | NE |
| 2024-02-13 | 531-358-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | LOUISVILLE | NE |
| 2024-02-13 | 531-441-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MEAD | NE |
| 2024-02-13 | 531-535-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KENESAW | NE |
| 2024-02-12 | 531-245-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HARVARD | NE |
| 2024-02-12 | 531-264-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | FIRTH | NE |
| 2024-02-12 | 531-305-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HICKMAN | NE |
| 2024-02-12 | 531-317-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HALLAM | NE |
| 2024-02-12 | 531-320-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GRAFTON | NE |
| 2024-02-12 | 531-323-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JULIAN | NE |
| 2024-02-12 | 531-533-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GUIDE ROCK | NE |
| 2024-02-08 | 531-251-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DAWSON | NE |
| 2024-02-08 | 531-273-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DE WITT | NE |
| 2024-02-08 | 531-298-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DORCHESTER | NE |
| 2024-02-08 | 531-309-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | EDGAR | NE |
| 2024-02-08 | 531-319-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DAVENPORT | NE |
| 2024-02-08 | 531-328-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | FAIRBURY | NE |
| 2024-02-08 | 531-338-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DAVID CITY | NE |
| 2024-02-08 | 531-521-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DAVEY | NE |
| 2024-02-08 | 531-534-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DEWEESE | NE |
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.