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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2007-07-25 203-616-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J DANBURY CT
2007-07-25 203-706-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2007-07-18 203-823-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J NEW HAVEN CT
2007-07-16 203-572-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2007-07-16 203-572-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2007-07-13 203-274-7XXX 7000–7999Assigned CSC VOICE, LLC 612K STAMFORD CT
2007-07-06 203-695-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2007-07-05 203-612-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 BRIDGEPORT CT
2007-07-02 203-202-4XXX 4000–4999Assigned METROPCS, INC. 5562 DARIEN CT
2007-07-02 203-383-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2007-07-02 203-455-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2007-07-02 203-898-0XXX 0000–0999Assigned METROPCS, INC. 5562 DARIEN CT
2007-07-02 203-953-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2007-07-02 203-953-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2007-07-02 203-953-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2007-06-29 203-893-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 ANSONIDRBY CT
2007-06-26 203-993-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2007-06-22 203-391-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J STAMFORD CT
2007-06-21 203-885-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 DANBURY CT
2007-06-18 203-883-7XXX 7000–7999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 STAMFORD CT
2007-06-18 203-883-8XXX 8000–8999Assigned CSC VOICE, LLC 612K STAMFORD CT
2007-06-18 203-908-3XXX 3000–3999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2007-06-18 203-908-4XXX 4000–4999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2007-06-11 203-517-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J STAMFORD CT
2007-06-08 203-296-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 BRIDGEPORT CT
2007-06-08 203-296-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 BRIDGEPORT CT
2007-06-08 203-296-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 BRIDGEPORT CT
2007-06-08 203-296-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 BRIDGEPORT CT
2007-06-08 203-919-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NORWALK CT
2007-06-07 203-535-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2007-06-07 203-859-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2007-06-07 203-993-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2007-06-04 203-742-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 GREENWICH CT
2007-05-15 203-810-4XXX 4000–4999Assigned CSC VOICE, LLC 612K NORWALK CT
2007-05-14 203-242-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HUNTINGTON CT
2007-05-08 203-706-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2007-05-01 203-304-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J NEWTOWN CT
2007-04-26 203-513-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HUNTINGTON CT
2007-04-26 203-737-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2007-04-17 203-703-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 STAMFORD CT
2007-04-17 203-703-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 STAMFORD CT
2007-04-12 203-971-7XXX 7000–7999Assigned VERIZON NEW YORK, INC. 9104 GREENWICH CT
2007-04-10 203-871-8XXX 8000–8999Assigned METROPCS, INC. 5562 BRANFORD CT
2007-04-05 203-993-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 BRIDGEPORT CT
2007-03-30 203-559-2XXX 2000–2999Assigned METROPCS, INC. 5562 DARIEN CT
2007-03-26 203-296-4XXX 4000–4999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2007-03-22 203-951-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 MILFORD CT
2007-03-07 203-769-5XXX 5000–5999Assigned CSC VOICE, LLC 612K GREENWICH CT
2007-03-07 203-935-6XXX 6000–6999Assigned METROPCS, INC. 5562 MERIDEN CT
2007-03-07 203-983-4XXX 4000–4999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 GREENWICH 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.