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
2005-08-03 231-824-5XXX 5000–5999Assigned TELNET WORLDWIDE, INC. 817J MANTON MI
2005-08-03 231-844-3XXX 3000–3999Assigned TELNET WORLDWIDE, INC. 817J INDIAN RIV MI
2005-08-03 231-981-4XXX 4000–4999Assigned TELNET WORLDWIDE, INC. 817J WHITEHALL MI
2005-08-03 231-994-0XXX 0000–0999Assigned TELNET WORLDWIDE, INC. 817J LKLEELANAU MI
2005-07-29 231-846-2XXX 2000–2999Assigned CYNERGYCOMM.NET, INC. - MI 9245 CADILLAC MI
2005-07-29 231-887-3XXX 3000–3999Assigned CYNERGYCOMM.NET, INC. - MI 9245 MANISTEE MI
2005-07-29 231-928-6XXX 6000–6999Assigned CYNERGYCOMM.NET, INC. - MI 9245 FREMONT MI
2005-07-27 231-350-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BELLAIRE MI
2005-07-27 231-794-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MANISTEE MI
2005-07-20 231-622-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PETOSKEY MI
2005-07-20 231-622-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PETOSKEY MI
2005-06-29 231-830-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2005-06-28 231-360-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TRAVERSECY MI
2005-06-14 231-366-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 FRUITPORT MI
2005-06-08 231-830-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2005-06-01 231-668-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TRAVERSECY MI
2005-05-23 231-333-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHEBOYGAN MI
2005-05-23 231-923-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HART MI
2005-05-20 231-408-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BIG RAPIDS MI
2005-05-18 231-577-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CADILLAC MI
2005-05-18 231-629-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BIG RAPIDS MI
2005-05-10 231-225-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FREMONT MI
2005-05-05 231-408-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BIG RAPIDS MI
2005-04-12 231-833-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOLVERINE MI
2005-03-17 231-830-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2005-03-11 231-736-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2005-03-09 231-758-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PETOSKEY MI
2005-03-04 231-571-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2005-03-04 231-571-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2005-03-04 231-571-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2005-03-02 231-829-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TUSTIN MI
2005-02-07 231-333-3XXX 3000–3999Assigned CYNERGYCOMM.NET, INC. - MI 9245 CHEBOYGAN MI
2005-02-07 231-459-1XXX 1000–1999Assigned CYNERGYCOMM.NET, INC. - MI 9245 BOYNE CITY MI
2005-02-03 231-903-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2005-02-01 231-424-7XXX 7000–7999Assigned ACD TELECOM, INC. - MI 3535 CARR MI
2005-02-01 231-450-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HESPERIA MI
2005-01-26 231-262-7XXX 7000–7999Assigned ACD TELECOM, INC. - MI 3535 ELMIRA MI
2005-01-26 231-515-7XXX 7000–7999Assigned ACD TELECOM, INC. - MI 3535 EVART MI
2005-01-26 231-981-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WHITEHALL MI
2005-01-21 231-366-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 FRUITPORT MI
2005-01-21 231-399-7XXX 7000–7999Assigned ACD TELECOM, INC. - MI 3535 FRANKFORT MI
2005-01-21 231-678-7XXX 7000–7999Assigned ACD TELECOM, INC. - MI 3535 BRETHREN MI
2005-01-21 231-774-7XXX 7000–7999Assigned ACD TELECOM, INC. - MI 3535 INTERLOCHN MI
2005-01-21 231-805-7XXX 7000–7999Assigned ACD TELECOM, INC. - MI 3535 KALEVA MI
2005-01-21 231-994-7XXX 7000–7999Assigned ACD TELECOM, INC. - MI 3535 LKLEELANAU MI
2005-01-18 231-267-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 WILLIAMSBG MI
2005-01-18 231-307-2XXX 2000–2999Assigned ACD TELECOM, INC. - MI 3535 MORLEY MI
2005-01-18 231-322-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 TRCHRIVBDG MI
2005-01-18 231-414-9XXX 9000–9999Assigned ACD TELECOM, INC. - MI 3535 NEWAYGO MI
2005-01-18 231-421-0XXX 0000–0999Assigned ACD TELECOM, INC. - MI 3535 TRAVERSECY 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.