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
2019-10-25 231-254-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 PETOSKEY MI
2019-10-22 231-939-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 PETOSKEY MI
2019-10-22 231-939-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 PETOSKEY MI
2019-10-21 231-244-3XXX 3000–3999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G BOYNE CITY MI
2019-10-11 231-400-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C ALANSON MI
2019-10-11 231-400-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C ALANSON MI
2019-10-11 231-500-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C WHITEHALL MI
2019-10-11 231-500-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C WHITEHALL MI
2019-10-10 231-531-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2019-10-10 231-531-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2019-10-01 231-216-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D FRANKFORT MI
2019-09-25 231-251-0XXX 0000–0999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G LKLEELANAU MI
2019-09-13 231-939-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2019-09-13 231-939-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2019-09-13 231-939-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2019-09-13 231-939-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2019-09-13 231-939-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2019-09-09 231-531-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2019-08-22 231-253-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CADILLAC MI
2019-08-14 231-266-7XXX 7000–7999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G IRONS MI
2019-08-09 231-272-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C KINGSLEY MI
2019-08-06 231-203-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C ALANSON MI
2019-08-06 231-227-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C HONOR MI
2019-08-06 231-259-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E SHELBY MI
2019-08-06 231-262-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C ELMIRA MI
2019-08-06 231-529-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C BRUTUS MI
2019-08-06 231-545-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C BOYNEFALLS MI
2019-08-06 231-626-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C LEVERING MI
2019-08-06 231-640-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C LAKE ANN MI
2019-08-06 231-835-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C GLEN LAKE MI
2019-08-06 231-866-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C SUTTONSBAY MI
2019-08-06 231-970-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C BEAR LAKE MI
2019-07-17 231-340-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ELMIRA MI
2019-07-17 231-340-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ELMIRA MI
2019-07-17 231-871-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BEULAH MI
2019-06-13 231-529-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BRUTUS MI
2019-05-29 231-900-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MUSKEGON MI
2019-05-24 231-203-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ALANSON MI
2019-05-23 231-545-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BOYNEFALLS MI
2019-05-23 231-626-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 LEVERING MI
2019-05-22 231-265-2XXX 2000–2999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G CORAL MI
2019-05-14 231-221-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HARBOR SPG MI
2019-05-14 231-900-0XXX 0000–0999Assigned FRACTEL, LLC 965H MUSKEGON MI
2019-05-14 231-900-9XXX 9000–9999Assigned FRACTEL, LLC 965H MUSKEGON MI
2019-05-10 231-253-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CADILLAC MI
2019-05-10 231-440-4XXX 4000–4999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G BALDWIN MI
2019-05-09 231-515-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E EVART MI
2019-04-24 231-598-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BIG RAPIDS MI
2019-04-23 231-685-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E RAVENNA MI
2019-04-23 231-763-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K AMBLE 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.