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 517
BANDWIDTH.COM CLEC, LLC - MI 73
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
2026-04-03 517-289-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E LANSING MI
2026-04-01 517-726-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E VERMONTVL MI
2026-04-01 517-797-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HILLSDALE MI
2025-12-17 517-352-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BATH MI
2025-11-20 517-361-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E NASHVILLE MI
2025-11-18 517-378-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E POTTERVL MI
2025-11-18 517-500-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E SUNFIELD MI
2025-11-12 517-345-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DIMONDALE MI
2025-09-18 517-996-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WILLIAMSTN MI
2025-06-25 517-259-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E JACKSON MI
2025-05-22 517-595-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WALDRON MI
2025-04-01 517-826-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E JONESVILLE MI
2025-03-27 517-384-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CHARLOTTE MI
2024-12-26 517-239-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DE WITT MI
2024-12-09 517-551-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E FOWLERVL MI
2024-11-23 517-299-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E LANSING MI
2024-11-23 517-746-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E COLDWATER MI
2024-10-14 517-343-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ALBION MI
2024-10-14 517-365-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WEBBERVL MI
2024-10-14 517-698-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E NORTHADAMS MI
2024-10-01 517-362-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MASON MI
2024-08-28 517-595-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WALDRON MI
2024-08-20 517-299-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E LANSING MI
2024-08-20 517-314-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E JACKSON MI
2024-08-20 517-379-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BUNDY HILL MI
2024-08-15 517-895-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CONCORD MI
2024-05-03 517-698-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E NORTHADAMS MI
2023-11-09 517-594-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E OSSEO MI
2023-01-25 517-299-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E LANSING MI
2022-02-03 517-939-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E QUINCY MI
2021-11-17 517-705-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BURLINGTON MI
2020-11-04 517-858-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BRONSON MI
2020-04-21 517-774-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E COLDWTR LK MI
2020-04-06 517-939-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E QUINCY MI
2020-04-02 517-858-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BRONSON MI
2019-04-23 517-741-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E UNION CITY MI
2018-07-24 517-583-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E TEKONSHA MI
2017-09-29 517-317-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E COLDWATER MI
2017-09-19 517-273-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWELL MI
2017-09-19 517-273-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWELL MI
2017-05-01 517-234-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWELL MI
2017-05-01 517-234-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWELL MI
2017-05-01 517-234-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWELL MI
2017-01-11 517-234-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWELL MI
2017-01-11 517-234-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWELL MI
2017-01-11 517-234-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWELL MI
2016-08-10 517-225-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWELL MI
2016-04-11 517-225-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWELL MI
2016-04-11 517-225-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWELL MI
2016-04-11 517-225-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWELL 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.