NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

7 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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, last 30 days — NPA 231
NEW CINGULAR WIRELESS PCS, LLC - IL 2
EXIANT COMMUNICATIONS LLC 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 2
AHOI LLC 1
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2021-07-02 231-466-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H EVART MI
2021-07-01 231-294-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H FIFE LAKE MI
2021-07-01 231-364-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H NORTHPORT MI
2021-07-01 231-374-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H SHELBY MI
2021-06-28 231-284-0XXX 0000–0999Assigned PENINSULA FIBER NETWORK, LLC - MI 116F MANISTEE MI
2021-06-25 231-297-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C KINGSLEY MI
2021-06-25 231-297-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C KINGSLEY MI
2021-06-25 231-367-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C WOLVERINE MI
2021-06-23 231-298-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C IRONS MI
2021-06-17 231-293-8XXX 8000–8999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G FRANKFORT MI
2021-06-15 231-294-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C FIFE LAKE MI
2021-06-15 231-294-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C FIFE LAKE MI
2021-06-15 231-364-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C NORTHPORT MI
2021-06-15 231-364-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C NORTHPORT MI
2021-06-15 231-374-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C SHELBY MI
2021-06-15 231-374-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C SHELBY MI
2021-06-11 231-251-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C LKLEELANAU MI
2021-06-11 231-265-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C CORAL MI
2021-06-11 231-270-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C BOYNE CITY MI
2021-06-11 231-270-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C BOYNE CITY MI
2021-06-11 231-273-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C EASTPORT MI
2021-06-11 231-293-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C FRANKFORT MI
2021-06-11 231-296-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C FREMONT MI
2021-06-11 231-296-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C FREMONT MI
2021-06-11 231-321-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C ELMIRA MI
2021-06-11 231-324-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C HARBOR SPG MI
2021-06-11 231-324-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C HARBOR SPG MI
2021-06-11 231-389-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C HARRIETTA MI
2021-06-11 231-431-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C CLAM RIVER MI
2021-06-11 231-495-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C BELLAIRE MI
2021-06-11 231-567-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H MUSKEGON MI
2021-06-11 231-567-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H MUSKEGON MI
2021-06-11 231-567-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H MUSKEGON MI
2021-06-11 231-567-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H MUSKEGON MI
2021-06-11 231-588-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C ELLSWORTH MI
2021-06-11 231-900-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H MUSKEGON MI
2021-06-11 231-907-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C LUDINGTON MI
2021-06-11 231-907-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C LUDINGTON MI
2021-05-28 231-284-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MANISTEE MI
2021-05-28 231-284-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MANISTEE MI
2021-05-28 231-284-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MANISTEE MI
2021-05-25 231-321-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H ELMIRA MI
2021-05-24 231-202-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H MECOSTA MI
2021-05-24 231-247-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H WILLIAMSBG MI
2021-05-24 231-381-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H WHITECLOUD MI
2021-05-24 231-404-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H STANWOOD MI
2021-05-24 231-422-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H PELLSTON MI
2021-05-24 231-448-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H ST JAMES MI
2021-05-24 231-455-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H PENTWATER MI
2021-05-24 231-500-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H WHITEHALL MI

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.