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
2011-01-31 203-822-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWALK CT
2011-01-31 203-892-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2011-01-31 203-892-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2011-01-13 203-361-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2011-01-13 203-361-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2011-01-13 203-361-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2011-01-12 203-293-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WESTPORT CT
2011-01-12 203-805-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2011-01-12 203-805-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2011-01-10 203-433-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 BRANFORD CT
2011-01-10 203-577-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WATERBURY CT
2011-01-10 203-916-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 BRIDGEPORT CT
2011-01-05 203-361-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2011-01-05 203-501-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2011-01-05 203-604-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2011-01-03 203-695-6XXX 6000–6999Assigned METROPCS, INC. 5562 WATERBURY CT
2011-01-03 203-695-9XXX 9000–9999Assigned METROPCS, INC. 5562 WATERBURY CT
2011-01-03 203-721-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2011-01-03 203-805-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2010-12-20 203-692-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 FAIRFIELD CT
2010-12-17 203-361-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW HAVEN CT
2010-12-15 203-441-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOLCOTT CT
2010-11-29 203-433-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRANFORD CT
2010-11-29 203-529-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WILTON CT
2010-11-17 203-584-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW HAVEN CT
2010-11-10 203-805-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2010-11-09 203-295-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NORWALK CT
2010-11-09 203-892-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2010-11-05 203-584-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2010-11-05 203-584-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2010-11-02 203-674-8XXX 8000–8999Assigned CSC VOICE, LLC 612K STAMFORD CT
2010-11-01 203-423-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WILTON CT
2010-10-29 203-295-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NORWALK CT
2010-10-29 203-701-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MILFORD CT
2010-10-26 203-826-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 DANBURY CT
2010-10-26 203-916-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 BRIDGEPORT CT
2010-10-26 203-951-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 MILFORD CT
2010-10-14 203-422-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2010-10-14 203-491-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEWTOWN CT
2010-10-14 203-584-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2010-10-14 203-584-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2010-10-14 203-584-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2010-10-14 203-930-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2010-10-13 203-212-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2010-10-13 203-212-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2010-10-13 203-212-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2010-10-13 203-443-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MERIDEN CT
2010-10-13 203-584-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2010-10-01 203-822-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWALK CT
2010-10-01 203-822-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWALK 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.