NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 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, all time — NPA 231
CHARTER IP ENABLED SERVICES, LLC 117
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
2025-03-12 231-214-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LAKE NORTH MI
2025-02-20 231-304-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BRUTUS MI
2024-09-16 231-393-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LE ROY MI
2024-07-19 231-371-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TUSTIN MI
2024-04-01 231-559-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MCBAIN MI
2024-03-01 231-453-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K HOLTON MI
2024-02-26 231-367-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WOLVERINE MI
2024-02-21 231-406-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FALMOUTH MI
2023-06-23 231-800-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LUTHER MI
2023-04-05 231-566-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K HARRIETTA MI
2023-02-08 231-772-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WELLSTON MI
2023-01-13 231-688-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MERRITT MI
2022-12-05 231-415-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K DUBLIN MI
2022-11-02 231-663-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MESICK MI
2022-08-25 231-862-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K HOXEYVILLE MI
2022-03-02 231-805-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K KALEVA MI
2021-05-13 231-296-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FREMONT MI
2021-05-13 231-298-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K IRONS MI
2021-05-13 231-381-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WHITECLOUD MI
2021-05-13 231-449-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BALDWIN MI
2021-05-11 231-278-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K HESPERIA MI
2021-05-11 231-464-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FREESOIL MI
2019-04-23 231-763-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K AMBLE MI
2017-11-03 231-564-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K KALKASKA MI
2017-07-31 231-223-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K OLDMISSION MI
2017-06-12 231-252-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TRAVERSECY MI
2017-06-02 231-489-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K PETOSKEY MI
2017-06-01 231-252-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TRAVERSECY MI
2017-04-25 231-252-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TRAVERSECY MI
2017-04-25 231-252-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TRAVERSECY MI
2016-12-13 231-246-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MUSKEGON MI
2016-12-08 231-898-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CARR MI
2016-09-26 231-545-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BOYNEFALLS MI
2016-05-23 231-277-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FOUNTAIN MI
2016-05-13 231-444-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CADILLAC MI
2016-05-11 231-252-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TRAVERSECY MI
2015-12-08 231-234-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BUCKLEY MI
2015-06-02 231-399-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FRANKFORT MI
2015-05-15 231-425-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LUDINGTON MI
2015-05-15 231-642-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TRAVERSECY MI
2015-04-20 231-497-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BOYNE CITY MI
2014-09-26 231-685-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K RAVENNA MI
2014-07-11 231-437-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CHARLEVOIX MI
2014-05-19 231-265-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CORAL MI
2014-04-04 231-486-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TRAVERSECY MI
2013-06-05 231-412-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K HARBOR SPG MI
2013-05-28 231-943-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TRAVERSECY MI
2013-05-07 231-881-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K PETOSKEY MI
2013-03-04 231-866-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SUTTONSBAY MI
2013-03-01 231-263-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K KINGSLEY 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.