NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

7 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2021-10-29 231-324-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H HARBOR SPG MI
2021-10-29 231-324-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H HARBOR SPG MI
2021-10-29 231-359-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H MECOSTA MI
2021-10-29 231-359-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H MECOSTA MI
2021-10-29 231-364-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H NORTHPORT MI
2021-10-29 231-364-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H NORTHPORT MI
2021-10-29 231-367-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H WOLVERINE MI
2021-10-29 231-367-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H WOLVERINE MI
2021-10-29 231-374-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H SHELBY MI
2021-10-29 231-374-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H SHELBY MI
2021-10-29 231-396-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C CADILLAC MI
2021-10-29 231-396-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C CADILLAC MI
2021-10-29 231-831-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H EASTJORDAN MI
2021-10-29 231-831-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H EASTJORDAN MI
2021-10-27 231-387-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2021-10-27 231-387-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2021-10-27 231-387-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2021-10-27 231-387-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2021-10-27 231-387-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2021-10-26 231-390-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BIG RAPIDS MI
2021-10-26 231-390-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BIG RAPIDS MI
2021-10-26 231-390-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BIG RAPIDS MI
2021-10-26 231-390-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BIG RAPIDS MI
2021-10-26 231-390-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BIG RAPIDS MI
2021-10-26 231-390-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BIG RAPIDS MI
2021-10-18 231-279-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C BIG RAPIDS MI
2021-10-18 231-279-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C BIG RAPIDS MI
2021-10-18 231-370-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2021-10-18 231-370-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2021-10-18 231-370-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2021-10-18 231-387-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C PETOSKEY MI
2021-10-18 231-387-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C PETOSKEY MI
2021-10-18 231-680-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C REED CITY MI
2021-10-15 231-324-0XXX 0000–0999Assigned COMMIO, LLC 939H HARBOR SPG MI
2021-10-15 231-324-1XXX 1000–1999Assigned COMMIO, LLC 939H HARBOR SPG MI
2021-10-13 231-454-0XXX 0000–0999Assigned METROPCS, INC. 5562 TRAVERSECY MI
2021-10-06 231-387-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2021-09-28 231-284-1XXX 1000–1999Assigned METROPCS, INC. 5562 MANISTEE MI
2021-09-28 231-707-5XXX 5000–5999Assigned METROPCS, INC. 5562 NEWAYGO MI
2021-09-27 231-279-4XXX 4000–4999Assigned METROPCS, INC. 5562 BIG RAPIDS MI
2021-09-23 231-454-4XXX 4000–4999Assigned METROPCS, INC. 5562 TRAVERSECY MI
2021-09-23 231-454-9XXX 9000–9999Assigned METROPCS, INC. 5562 TRAVERSECY MI
2021-09-22 231-550-9XXX 9000–9999Assigned METROPCS, INC. 5562 PETOSKEY MI
2021-09-20 231-880-2XXX 2000–2999Assigned METROPCS, INC. 5562 MUSKEGON MI
2021-09-20 231-968-3XXX 3000–3999Assigned METROPCS, INC. 5562 CADILLAC MI
2021-09-20 231-968-8XXX 8000–8999Assigned METROPCS, INC. 5562 CADILLAC MI
2021-09-16 231-968-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CADILLAC MI
2021-09-16 231-968-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CADILLAC MI
2021-09-09 231-253-5XXX 5000–5999Assigned METROPCS, INC. 5562 CADILLAC MI
2021-09-09 231-281-0XXX 0000–0999Assigned METROPCS, INC. 5562 CADILLAC MI

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.