NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

5 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 203
ONVOY, LLC - CT 5
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
2011-04-27 203-800-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2011-04-27 203-800-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2011-04-27 203-814-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2011-04-27 203-864-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2011-04-27 203-916-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2011-04-27 203-993-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2011-04-22 203-800-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J NEW HAVEN CT
2011-04-20 203-405-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOODBURY CT
2011-04-20 203-617-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DANBURY CT
2011-04-20 203-617-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DANBURY CT
2011-04-18 203-717-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2011-04-14 203-633-5XXX 5000–5999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 WOLCOTT CT
2011-04-05 203-295-8XXX 8000–8999Assigned CSC VOICE, LLC 612K NORWALK CT
2011-04-05 203-539-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2011-04-05 203-628-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2011-04-05 203-800-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2011-04-05 203-800-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2011-04-05 203-892-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 ANSONIDRBY CT
2011-04-05 203-970-3XXX 3000–3999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 NORWALK CT
2011-04-01 203-429-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2011-04-01 203-429-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2011-03-25 203-693-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 MILFORD CT
2011-03-25 203-916-8XXX 8000–8999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 BRIDGEPORT CT
2011-03-24 203-595-5XXX 5000–5999Assigned CSC VOICE, LLC 612K STAMFORD CT
2011-03-24 203-690-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J BRIDGEPORT CT
2011-03-24 203-916-7XXX 7000–7999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2011-03-24 203-955-1XXX 1000–1999Assigned CSC VOICE, LLC 612K FAIRFIELD CT
2011-03-17 203-585-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2011-03-17 203-646-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRANFORD CT
2011-03-14 203-349-0XXX 0000–0999Assigned METROPCS, INC. 5562 WESTPORT CT
2011-03-14 203-424-3XXX 3000–3999Assigned METROPCS, INC. 5562 DARIEN CT
2011-03-14 203-424-4XXX 4000–4999Assigned METROPCS, INC. 5562 DARIEN CT
2011-03-14 203-424-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DARIEN CT
2011-03-14 203-443-2XXX 2000–2999Assigned METROPCS, INC. 5562 MERIDEN CT
2011-03-14 203-643-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J BRANFORD CT
2011-03-11 203-800-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2011-03-11 203-999-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2011-03-11 203-999-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2011-03-11 203-999-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2011-03-11 203-999-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2011-03-11 203-999-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2011-03-11 203-999-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2011-03-11 203-999-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2011-03-11 203-999-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2011-03-11 203-999-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2011-03-11 203-999-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2011-03-10 203-707-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2011-03-09 203-864-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2011-03-09 203-864-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2011-03-09 203-864-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT 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.