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
2009-07-31 231-955-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2009-07-20 231-245-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWAYGO MI
2009-07-17 231-871-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BEULAH MI
2009-07-13 231-866-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SUTTONSBAY MI
2009-07-13 231-912-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 REED CITY MI
2009-06-30 231-492-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TRAVERSECY MI
2009-06-05 231-414-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWAYGO MI
2009-06-05 231-640-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAKE ANN MI
2009-05-22 231-884-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CADILLAC MI
2009-05-15 231-719-6XXX 6000–6999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L MUSKEGON MI
2009-04-30 231-414-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 NEWAYGO MI
2009-04-10 231-570-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FIFE LAKE MI
2009-04-02 231-492-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 TRAVERSECY MI
2009-03-26 231-239-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LUDINGTON MI
2009-03-26 231-239-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LUDINGTON MI
2009-02-26 231-683-0XXX 0000–0999Assigned METROPCS, INC. 5562 MUSKEGON MI
2009-02-26 231-683-3XXX 3000–3999Assigned METROPCS, INC. 5562 MUSKEGON MI
2009-02-26 231-683-5XXX 5000–5999Assigned METROPCS, INC. 5562 MUSKEGON MI
2009-02-26 231-683-6XXX 6000–6999Assigned METROPCS, INC. 5562 MUSKEGON MI
2009-02-26 231-683-7XXX 7000–7999Assigned METROPCS, INC. 5562 MUSKEGON MI
2009-02-26 231-683-8XXX 8000–8999Assigned METROPCS, INC. 5562 MUSKEGON MI
2009-02-20 231-388-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LE ROY MI
2009-02-18 231-955-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2009-02-05 231-335-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E FREMONT MI
2009-02-05 231-480-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E LUDINGTON MI
2009-02-05 231-660-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BIG RAPIDS MI
2009-02-05 231-680-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E REED CITY MI
2009-02-05 231-715-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E TRAVERSECY MI
2009-02-05 231-742-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HART MI
2009-02-05 231-753-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E PETOSKEY MI
2009-02-05 231-769-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MUSKEGON MI
2009-02-05 231-769-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MUSKEGON MI
2009-02-05 231-794-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MANISTEE MI
2009-02-05 231-818-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CHEBOYGAN MI
2009-02-05 231-846-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CADILLAC MI
2009-02-05 231-981-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WHITEHALL MI
2009-01-28 231-791-7XXX 7000–7999Assigned 123.NET, LLC 2550 REED CITY MI
2009-01-13 231-912-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 REED CITY MI
2009-01-07 231-571-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2009-01-06 231-239-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LUDINGTON MI
2009-01-06 231-970-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BEAR LAKE MI
2009-01-05 231-414-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWAYGO MI
2008-12-12 231-676-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELLAIRE MI
2008-12-11 231-377-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CLAM RIVER MI
2008-12-01 231-729-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IRONS MI
2008-11-19 231-853-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J RAVENNA MI
2008-11-19 231-981-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WHITEHALL MI
2008-11-07 231-667-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARION MI
2008-11-03 231-432-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 NORTHPORT MI
2008-10-30 231-459-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BOYNE CITY 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.