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
2013-08-14 203-585-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-08-07 203-442-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW CANAAN CT
2013-07-15 203-817-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-07-15 203-817-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-07-15 203-817-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-07-15 203-970-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2013-07-15 203-970-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2013-07-15 203-970-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2013-07-10 203-266-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WOODBURY CT
2013-07-10 203-998-7XXX 7000–7999Assigned CSC VOICE, LLC 612K STAMFORD CT
2013-07-02 203-704-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WOLCOTT CT
2013-06-26 203-456-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DANBURY CT
2013-06-26 203-628-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DANBURY CT
2013-06-25 203-892-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2013-06-14 203-440-5XXX 5000–5999Assigned METROPCS, INC. 5562 MERIDEN CT
2013-06-14 203-850-5XXX 5000–5999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2013-05-31 203-762-6XXX 6000–6999Assigned CSC VOICE, LLC 612K WILTON CT
2013-05-29 203-208-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRANFORD CT
2013-05-22 203-894-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J RIDGEFIELD CT
2013-05-21 203-970-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2013-05-21 203-970-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2013-05-21 203-970-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2013-05-10 203-664-4XXX 4000–4999Assigned CSC VOICE, LLC 612K REDDING CT
2013-05-10 203-693-2XXX 2000–2999Assigned CSC VOICE, LLC 612K MILFORD CT
2013-04-26 203-586-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WOODBURY CT
2013-04-25 203-679-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2013-04-19 203-997-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 ANSONIDRBY CT
2013-04-19 203-997-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 ANSONIDRBY CT
2013-04-11 203-900-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 GREENWICH CT
2013-04-08 203-580-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BYRAM CT
2013-04-08 203-580-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BYRAM CT
2013-04-05 203-242-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F HUNTINGTON CT
2013-04-05 203-318-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F MADISON CT
2013-04-05 203-344-7XXX 7000–7999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F OLDGRNWICH CT
2013-04-05 203-405-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WOODBURY CT
2013-04-05 203-424-2XXX 2000–2999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DARIEN CT
2013-04-05 203-427-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F MERIDEN CT
2013-04-05 203-456-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DANBURY CT
2013-04-05 203-456-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DANBURY CT
2013-04-05 203-484-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRANFORD CT
2013-04-05 203-486-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WOODBURY CT
2013-04-05 203-529-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WILTON CT
2013-04-05 203-533-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F GUILFORD CT
2013-04-05 203-563-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WILTON CT
2013-04-05 203-587-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F GEORGETOWN CT
2013-04-05 203-587-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F GEORGETOWN CT
2013-04-05 203-590-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F TRUMBULL CT
2013-04-05 203-590-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F TRUMBULL CT
2013-04-05 203-599-7XXX 7000–7999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F MERIDEN CT
2013-04-05 203-633-7XXX 7000–7999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WOLCOTT 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.