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 203
BANDWIDTH.COM CLEC, LLC - CT 313
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
2024-12-06 203-487-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2021-09-29 203-649-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2021-09-29 203-714-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NAUGATUCK CT
2020-10-23 203-718-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2020-10-23 203-718-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2018-09-19 203-626-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2016-06-20 203-678-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2016-06-17 203-664-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F REDDING CT
2016-06-14 203-439-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2016-06-14 203-884-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GUILFORD CT
2015-09-03 203-586-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOODBURY CT
2015-07-24 203-742-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GREENWICH CT
2015-05-28 203-741-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2015-04-27 203-408-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F REDDING CT
2015-04-24 203-409-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F OLDGRNWICH CT
2015-04-24 203-580-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BYRAM CT
2015-04-16 203-447-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F HUNTINGTON CT
2015-04-16 203-538-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F HUNTINGTON CT
2015-04-13 203-263-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOODBURY CT
2015-04-13 203-263-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOODBURY CT
2015-04-13 203-293-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2015-04-13 203-293-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2015-04-13 203-293-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2015-04-13 203-441-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOLCOTT CT
2015-04-13 203-689-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GUILFORD CT
2015-04-13 203-689-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GUILFORD CT
2015-04-13 203-718-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2015-04-13 203-872-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2015-01-12 203-872-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2014-12-12 203-706-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2014-12-12 203-802-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2014-12-12 203-805-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2014-11-25 203-514-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MERIDEN CT
2014-11-25 203-694-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MERIDEN CT
2014-11-06 203-951-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MILFORD CT
2014-10-29 203-442-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW CANAAN CT
2014-10-27 203-635-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2014-10-27 203-635-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2014-10-09 203-900-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GREENWICH CT
2014-10-09 203-900-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GREENWICH CT
2014-10-01 203-590-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F TRUMBULL CT
2014-10-01 203-633-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOLCOTT CT
2014-09-23 203-544-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GEORGETOWN CT
2014-08-12 203-666-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2014-08-12 203-666-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2014-08-12 203-666-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2014-08-12 203-864-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2014-07-28 203-951-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MILFORD CT
2014-06-02 203-350-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MADISON CT
2014-06-02 203-518-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT

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.