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
2013-04-05 203-633-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WOLCOTT CT
2013-04-05 203-635-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WESTPORT CT
2013-04-05 203-635-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WESTPORT CT
2013-04-05 203-678-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WALLINGFD CT
2013-04-05 203-680-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NEW HAVEN CT
2013-04-05 203-689-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F GUILFORD CT
2013-04-05 203-693-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F MILFORD CT
2013-04-05 203-693-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F MILFORD CT
2013-04-05 203-718-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F CHESHIRE CT
2013-04-05 203-780-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NEW HAVEN CT
2013-04-05 203-793-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WALLINGFD CT
2013-04-05 203-871-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRANFORD CT
2013-04-05 203-872-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F CHESHIRE CT
2013-04-05 203-875-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DARIEN CT
2013-04-05 203-896-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F MADISON CT
2013-04-05 203-968-5XXX 5000–5999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 STAMFORD CT
2013-04-05 203-989-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F STAMFORD CT
2013-04-05 203-990-5XXX 5000–5999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F OLDGRNWICH CT
2013-04-05 203-998-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F STAMFORD CT
2013-04-04 203-408-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F REDDING CT
2013-04-04 203-408-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F REDDING CT
2013-04-04 203-442-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NEW CANAAN CT
2013-04-04 203-594-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NEW CANAAN CT
2013-04-04 203-894-2XXX 2000–2999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F RIDGEFIELD CT
2013-04-04 203-894-6XXX 6000–6999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F RIDGEFIELD CT
2013-04-04 203-945-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NORWALK CT
2013-04-04 203-945-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NORWALK CT
2013-03-20 203-802-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2013-03-08 203-491-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWTOWN CT
2013-03-08 203-529-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WILTON CT
2013-03-06 203-957-8XXX 8000–8999Assigned CSC VOICE, LLC 612K NORWALK CT
2013-03-01 203-590-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TRUMBULL CT
2013-02-20 203-724-9XXX 9000–9999Assigned CSC VOICE, LLC 612K STAMFORD CT
2013-02-05 203-486-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOODBURY CT
2013-01-17 203-343-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2013-01-17 203-343-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2013-01-17 203-628-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2013-01-14 203-491-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEWTOWN CT
2013-01-07 203-817-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-01-07 203-817-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-01-07 203-817-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-01-04 203-818-2XXX 2000–2999Assigned METROPCS, INC. 5562 NORWALK CT
2012-12-21 203-405-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOODBURY CT
2012-12-21 203-680-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2012-12-21 203-680-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2012-12-20 203-970-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWALK CT
2012-12-20 203-970-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWALK CT
2012-12-19 203-680-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW HAVEN CT
2012-12-14 203-456-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2012-12-12 203-883-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 STAMFORD 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.