NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

4 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 475
BANDWIDTH.COM CLEC, LLC - CT 4
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
2026-09-02 475-381-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2026-09-02 475-394-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F ANSONIDRBY CT
2026-09-02 475-403-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2026-09-02 475-747-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NORWALK CT
2026-08-13 475-350-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2026-08-13 475-363-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2026-08-13 475-391-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2026-07-09 475-344-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2026-07-09 475-389-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2026-07-09 475-394-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F ANSONIDRBY CT
2026-07-09 475-544-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NORWALK CT
2026-07-09 475-998-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F FAIRFIELD CT
2026-05-08 475-357-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MILFORD CT
2026-05-08 475-358-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRANFORD CT
2026-05-08 475-383-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GREENWICH CT
2026-05-08 475-397-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NORWALK CT
2026-05-08 475-398-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F HUNTINGTON CT
2026-04-09 475-388-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2026-04-09 475-388-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2026-04-02 475-396-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2026-01-23 475-394-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F ANSONIDRBY CT
2025-04-14 475-363-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2025-04-14 475-364-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOODBURY CT
2025-02-20 475-388-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2024-12-06 475-350-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2024-10-03 475-354-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2024-09-19 475-341-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2023-03-21 475-303-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GREENWICH CT
2022-11-07 475-356-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2022-10-12 475-356-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2022-09-26 475-639-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F REDDING CT
2022-09-26 475-639-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F REDDING CT
2022-09-26 475-639-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F REDDING CT
2022-09-26 475-639-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F REDDING CT
2022-09-26 475-639-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F REDDING CT
2022-08-30 475-356-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2022-08-30 475-356-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2022-08-29 475-306-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2022-08-29 475-306-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2022-07-21 475-480-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2022-07-21 475-480-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2022-07-21 475-480-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2022-07-21 475-480-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2022-07-21 475-480-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2022-07-21 475-480-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2022-07-21 475-480-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2021-11-18 475-310-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2021-11-18 475-310-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2021-11-17 475-600-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F SEYMOUR CT
2021-11-17 475-600-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F SEYMOUR CT

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.