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
2021-09-09 231-281-1XXX 1000–1999Assigned METROPCS, INC. 5562 CADILLAC MI
2021-09-09 231-285-6XXX 6000–6999Assigned METROPCS, INC. 5562 CADILLAC MI
2021-09-09 231-370-0XXX 0000–0999Assigned METROPCS, INC. 5562 MUSKEGON MI
2021-09-09 231-627-0XXX 0000–0999Assigned COMMIO, LLC 939H CHEBOYGAN MI
2021-09-09 231-786-4XXX 4000–4999Assigned METROPCS, INC. 5562 TRAVERSECY MI
2021-09-09 231-786-5XXX 5000–5999Assigned METROPCS, INC. 5562 TRAVERSECY MI
2021-09-09 231-786-6XXX 6000–6999Assigned METROPCS, INC. 5562 TRAVERSECY MI
2021-09-09 231-880-1XXX 1000–1999Assigned COMMIO, LLC 939H MUSKEGON MI
2021-09-09 231-880-8XXX 8000–8999Assigned COMMIO, LLC 939H MUSKEGON MI
2021-09-09 231-880-9XXX 9000–9999Assigned COMMIO, LLC 939H MUSKEGON MI
2021-09-08 231-880-0XXX 0000–0999Assigned SKYE TELECOM LLC DBA SKYETEL 622J MUSKEGON MI
2021-09-03 231-278-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J HESPERIA MI
2021-09-03 231-320-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E TRCHRIVBDG MI
2021-09-03 231-370-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2021-09-03 231-370-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2021-09-03 231-371-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E TUSTIN MI
2021-09-02 231-283-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2021-09-02 231-283-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2021-08-26 231-379-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ONEKAMA MI
2021-08-19 231-475-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MANTON MI
2021-08-17 231-280-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MANCELONA MI
2021-08-17 231-786-0XXX 0000–0999Assigned COMMIO, LLC 939H TRAVERSECY MI
2021-08-17 231-786-1XXX 1000–1999Assigned COMMIO, LLC 939H TRAVERSECY MI
2021-08-17 231-786-3XXX 3000–3999Assigned COMMIO, LLC 939H TRAVERSECY MI
2021-08-17 231-786-9XXX 9000–9999Assigned COMMIO, LLC 939H TRAVERSECY MI
2021-08-12 231-977-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MACKINAWCY MI
2021-08-11 231-270-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C BOYNE CITY MI
2021-08-11 231-270-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C BOYNE CITY MI
2021-08-11 231-321-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C ELMIRA MI
2021-08-11 231-431-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C CLAM RIVER MI
2021-08-11 231-495-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BELLAIRE MI
2021-08-10 231-367-8XXX 8000–8999Assigned TON80 COMMUNICATIONS, LLC 516J WOLVERINE MI
2021-08-10 231-763-8XXX 8000–8999Assigned TON80 COMMUNICATIONS, LLC 516J AMBLE MI
2021-08-09 231-442-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HARRIETTA MI
2021-08-05 231-464-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E FREESOIL MI
2021-08-05 231-466-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J EVART MI
2021-08-03 231-385-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CORAL MI
2021-07-28 231-298-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C IRONS MI
2021-07-27 231-431-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CLAM RIVER MI
2021-07-26 231-247-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C WILLIAMSBG MI
2021-07-22 231-999-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CENTRAL LK MI
2021-07-20 231-385-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C CORAL MI
2021-07-20 231-385-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C CORAL MI
2021-07-20 231-495-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BELLAIRE MI
2021-07-19 231-442-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C HARRIETTA MI
2021-07-19 231-449-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C BALDWIN MI
2021-07-19 231-449-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C BALDWIN MI
2021-07-19 231-994-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C LKLEELANAU MI
2021-07-02 231-376-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C TWIN LAKE MI
2021-07-02 231-393-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H LE ROY 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.