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
2021-02-04 231-771-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C ELK RAPIDS MI
2021-02-04 231-787-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C WHITECLOUD MI
2021-02-04 231-787-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C WHITECLOUD MI
2021-02-04 231-974-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C GRANT MI
2021-02-04 231-974-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C GRANT MI
2021-02-04 231-999-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C CENTRAL LK MI
2021-02-04 231-999-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C CENTRAL LK MI
2021-01-20 231-283-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2021-01-20 231-283-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2021-01-11 231-443-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C HONOR MI
2021-01-11 231-443-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C HONOR MI
2021-01-11 231-443-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C HONOR MI
2021-01-11 231-443-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C HONOR MI
2021-01-11 231-455-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C PENTWATER MI
2021-01-11 231-455-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C PENTWATER MI
2021-01-11 231-455-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C PENTWATER MI
2021-01-11 231-455-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C PENTWATER MI
2021-01-05 231-261-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C LUDINGTON MI
2021-01-05 231-261-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C LUDINGTON MI
2021-01-05 231-261-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C LUDINGTON MI
2021-01-05 231-400-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C ALANSON MI
2021-01-05 231-400-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C ALANSON MI
2021-01-05 231-634-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C BOIS BLANC MI
2021-01-05 231-634-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C BOIS BLANC MI
2021-01-05 231-867-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C CHIPPEWALK MI
2021-01-05 231-867-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C CHIPPEWALK MI
2021-01-05 231-867-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C CHIPPEWALK MI
2020-12-21 231-436-3XXX 3000–3999Assigned TERRA NOVA TELECOM INC. 145J MACKINAWCY MI
2020-12-21 231-445-4XXX 4000–4999Assigned TERRA NOVA TELECOM INC. 145J CHEBOYGAN MI
2020-12-21 231-624-6XXX 6000–6999Assigned TERRA NOVA TELECOM INC. 145J KALKASKA MI
2020-12-21 231-829-5XXX 5000–5999Assigned TERRA NOVA TELECOM INC. 145J TUSTIN MI
2020-12-11 231-600-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C TRAVERSECY MI
2020-12-11 231-600-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C TRAVERSECY MI
2020-12-11 231-943-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C TRAVERSECY MI
2020-12-07 231-447-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOLTON MI
2020-12-03 231-567-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MUSKEGON MI
2020-12-03 231-567-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MUSKEGON MI
2020-12-03 231-567-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MUSKEGON MI
2020-12-03 231-567-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MUSKEGON MI
2020-12-03 231-567-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MUSKEGON MI
2020-11-18 231-333-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CHEBOYGAN MI
2020-11-18 231-333-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CHEBOYGAN MI
2020-11-10 231-283-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2020-11-10 231-283-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2020-11-10 231-283-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2020-11-10 231-283-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2020-11-09 231-227-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E HONOR MI
2020-11-09 231-254-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2020-11-09 231-254-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2020-11-09 231-254-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY 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.