NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

5 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, 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
2005-03-11 203-535-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2005-03-11 203-535-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2005-03-11 203-535-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2005-03-11 203-535-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2005-03-07 203-848-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2005-02-28 203-612-1XXX 1000–1999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2005-02-28 203-628-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2005-02-28 203-923-2XXX 2000–2999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2005-02-28 203-923-8XXX 8000–8999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2005-02-23 203-517-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 STAMFORD CT
2005-02-23 203-621-4XXX 4000–4999Assigned METROPCS, INC. 5562 DARIEN CT
2005-02-22 203-540-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2005-02-18 203-445-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 TRUMBULL CT
2005-02-15 203-244-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J RIDGEFIELD CT
2005-02-14 203-604-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NORWALK CT
2005-02-10 203-673-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2005-02-10 203-725-2XXX 2000–2999Assigned METROPCS, INC. 5562 WATERBURY CT
2005-02-10 203-868-7XXX 7000–7999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2005-02-10 203-868-8XXX 8000–8999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2005-02-09 203-673-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2005-02-07 203-307-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2005-02-07 203-307-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2005-02-07 203-307-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2005-02-07 203-307-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2005-02-07 203-898-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2005-02-07 203-898-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2005-02-07 203-898-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2005-02-07 203-898-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2005-02-04 203-990-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 OLDGRNWICH CT
2005-02-04 203-990-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 OLDGRNWICH CT
2005-02-04 203-990-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 OLDGRNWICH CT
2005-02-03 203-504-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 STAMFORD CT
2005-02-03 203-610-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J BRIDGEPORT CT
2005-02-03 203-721-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2005-02-03 203-983-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J GREENWICH CT
2005-02-02 203-583-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 BRIDGEPORT CT
2005-01-25 203-437-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WATERBURY CT
2005-01-25 203-446-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 ANSONIDRBY CT
2005-01-25 203-583-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2005-01-25 203-583-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2005-01-25 203-583-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2005-01-25 203-725-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2005-01-25 203-725-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2005-01-25 203-725-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2005-01-25 203-725-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2005-01-20 203-621-8XXX 8000–8999Assigned METROPCS, INC. 5562 DARIEN CT
2005-01-20 203-633-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WOLCOTT CT
2005-01-15 203-460-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2005-01-13 203-252-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 STAMFORD CT
2005-01-13 203-490-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NAUGATUCK 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.