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
2003-03-04 203-980-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2003-03-03 203-542-5XXX 5000–5999Assigned CSC VOICE, LLC 612K GREENWICH CT
2003-03-03 203-542-6XXX 6000–6999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 GREENWICH CT
2003-02-26 203-763-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 FAIRFIELD CT
2003-02-26 203-803-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NORWALK CT
2003-02-20 203-401-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2003-02-12 203-809-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2003-02-12 203-809-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2003-02-06 203-566-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-566-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-566-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-566-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-566-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-566-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-566-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-566-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-566-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-566-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-607-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-607-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-607-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-607-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-607-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-607-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-607-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-607-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-607-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-06 203-607-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-05 203-437-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WATERBURY CT
2003-02-04 203-273-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2003-01-28 203-228-3XXX 3000–3999Assigned METROPCS, INC. 5562 WATERBURY CT
2003-01-28 203-619-1XXX 1000–1999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2003-01-28 203-619-2XXX 2000–2999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2003-01-28 203-619-3XXX 3000–3999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2003-01-28 203-619-4XXX 4000–4999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2003-01-22 203-228-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2003-01-06 203-809-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2003-01-06 203-980-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2003-01-03 203-273-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2002-12-27 203-523-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J NORWALK CT
2002-12-13 203-599-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 MERIDEN CT
2002-11-27 203-704-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WOLCOTT CT
2002-11-27 203-704-1XXX 1000–1999Assigned METROPCS, INC. 5562 WOLCOTT CT
2002-11-25 203-306-8XXX 8000–8999Assigned METROPCS, INC. 5562 MILFORD CT
2002-11-25 203-364-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEWTOWN CT
2002-11-25 203-364-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEWTOWN CT
2002-11-25 203-423-9XXX 9000–9999Assigned METROPCS, INC. 5562 WILTON CT
2002-11-25 203-487-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J STAMFORD CT
2002-11-25 203-559-8XXX 8000–8999Assigned METROPCS, INC. 5562 DARIEN CT
2002-11-25 203-559-9XXX 9000–9999Assigned METROPCS, INC. 5562 DARIEN 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.