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
2004-01-15 203-306-7XXX 7000–7999Assigned METROPCS, INC. 5562 MILFORD CT
2004-01-15 203-886-7XXX 7000–7999Assigned METROPCS, INC. 5562 MERIDEN CT
2004-01-09 203-460-1XXX 1000–1999Assigned METROPCS, INC. 5562 DANBURY CT
2004-01-09 203-559-0XXX 0000–0999Assigned METROPCS, INC. 5562 DARIEN CT
2004-01-09 203-559-1XXX 1000–1999Assigned METROPCS, INC. 5562 DARIEN CT
2004-01-09 203-927-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2003-12-22 203-442-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 NEW CANAAN CT
2003-12-22 203-564-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAMFORD CT
2003-12-19 203-549-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2003-12-19 203-549-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2003-12-11 203-369-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 OLDGRNWICH CT
2003-12-11 203-369-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 OLDGRNWICH CT
2003-12-11 203-369-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 OLDGRNWICH CT
2003-12-08 203-418-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2003-12-08 203-418-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2003-12-05 203-228-9XXX 9000–9999Assigned METROPCS, INC. 5562 WATERBURY CT
2003-12-05 203-369-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 OLDGRNWICH CT
2003-12-05 203-369-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 OLDGRNWICH CT
2003-12-05 203-369-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 OLDGRNWICH CT
2003-12-05 203-369-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 OLDGRNWICH CT
2003-12-05 203-669-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2003-12-05 203-673-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2003-12-05 203-687-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2003-12-05 203-875-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2003-12-05 203-875-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2003-12-05 203-875-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2003-12-05 203-875-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2003-12-02 203-586-3XXX 3000–3999Assigned CSC VOICE, LLC 612K WOODBURY CT
2003-11-17 203-942-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2003-11-12 203-437-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2003-11-12 203-604-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J NORWALK CT
2003-11-05 203-692-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2003-11-05 203-692-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2003-11-05 203-763-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2003-11-05 203-763-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2003-11-05 203-763-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2003-11-05 203-801-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 NEW CANAAN CT
2003-11-05 203-801-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J NEW CANAAN CT
2003-10-31 203-252-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J STAMFORD CT
2003-10-24 203-923-5XXX 5000–5999Assigned METROPCS, INC. 5562 BRIDGEPORT CT
2003-10-23 203-532-5XXX 5000–5999Assigned CSC VOICE, LLC 612K BYRAM CT
2003-10-20 203-875-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2003-10-20 203-875-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2003-10-20 203-875-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2003-10-20 203-875-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2003-10-09 203-369-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 OLDGRNWICH CT
2003-10-09 203-369-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 OLDGRNWICH CT
2003-10-09 203-369-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 OLDGRNWICH CT
2003-10-08 203-648-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2003-10-08 203-927-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN 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.