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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2012-05-23 203-705-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2012-05-23 203-819-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2012-05-14 203-763-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F FAIRFIELD CT
2012-05-14 203-836-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2012-05-14 203-836-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2012-05-14 203-836-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2012-05-11 203-403-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F RIDGEFIELD CT
2012-05-11 203-405-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J WOODBURY CT
2012-05-07 203-309-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DARIEN CT
2012-05-01 203-491-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K NEWTOWN CT
2012-04-23 203-836-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2012-04-19 203-204-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GUILFORD CT
2012-04-17 203-590-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F TRUMBULL CT
2012-04-17 203-760-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRIDGEPORT CT
2012-04-17 203-760-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRIDGEPORT CT
2012-04-17 203-760-2XXX 2000–2999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRIDGEPORT CT
2012-04-17 203-760-3XXX 3000–3999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRIDGEPORT CT
2012-04-17 203-760-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRIDGEPORT CT
2012-04-17 203-760-5XXX 5000–5999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRIDGEPORT CT
2012-04-17 203-760-6XXX 6000–6999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRIDGEPORT CT
2012-04-17 203-760-7XXX 7000–7999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRIDGEPORT CT
2012-04-17 203-760-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRIDGEPORT CT
2012-04-17 203-760-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRIDGEPORT CT
2012-04-03 203-489-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F GREENWICH CT
2012-03-28 203-489-4XXX 4000–4999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 GREENWICH CT
2012-03-28 203-514-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MERIDEN CT
2012-03-28 203-514-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MERIDEN CT
2012-03-21 203-292-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C FAIRFIELD CT
2012-03-21 203-456-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DANBURY CT
2012-03-21 203-489-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GREENWICH CT
2012-03-21 203-658-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2012-03-21 203-677-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2012-03-21 203-822-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NORWALK CT
2012-03-21 203-836-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2012-03-14 203-349-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2012-03-14 203-720-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NAUGATUCK CT
2012-03-12 203-489-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F GREENWICH CT
2012-03-08 203-538-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J HUNTINGTON CT
2012-03-07 203-889-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2012-02-27 203-900-1XXX 1000–1999Assigned CSC VOICE, LLC 612K GREENWICH CT
2012-02-27 203-914-1XXX 1000–1999Assigned CSC VOICE, LLC 612K STAMFORD CT
2012-02-17 203-864-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2012-02-15 203-529-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WILTON CT
2012-02-08 203-590-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 TRUMBULL CT
2012-02-08 203-635-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WESTPORT CT
2012-02-08 203-819-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WATERBURY CT
2012-02-08 203-941-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 SEYMOUR CT
2012-02-08 203-989-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 STAMFORD CT
2012-01-30 203-489-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J GREENWICH CT
2012-01-19 203-836-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J NEW HAVEN 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.