NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

25 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 475
ONVOY, LLC - CT 17
BANDWIDTH.COM CLEC, LLC - CT 4
CSC WIRELESS, LLC 3
OMNIPOINT COMMUNICATIONS, INC. - CT 1
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
2013-10-11 475-201-3XXX 3000–3999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2013-10-11 475-201-4XXX 4000–4999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2013-10-11 475-239-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 TRUMBULL CT
2013-10-11 475-243-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2013-10-11 475-999-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 FAIRFIELD CT
2013-10-08 475-205-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-10-08 475-205-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-10-08 475-205-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-10-08 475-205-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-10-08 475-205-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-10-08 475-205-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-09-24 475-999-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F FAIRFIELD CT
2013-09-18 475-298-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BRIDGEPORT CT
2013-09-18 475-529-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J DANBURY CT
2013-09-12 475-882-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HUNTINGTON CT
2013-09-04 475-882-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HUNTINGTON CT
2013-08-28 475-222-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J WATERBURY CT
2013-08-23 475-882-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J HUNTINGTON CT
2013-08-23 475-882-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J HUNTINGTON CT
2013-08-14 475-227-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2013-08-14 475-238-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2013-08-07 475-243-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F ANSONIDRBY CT
2013-08-02 475-243-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2013-07-16 475-204-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2013-07-16 475-243-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 ANSONIDRBY CT
2013-07-16 475-422-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2013-07-15 475-222-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2013-07-15 475-222-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2013-07-11 475-222-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J WATERBURY CT
2013-07-10 475-204-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2013-06-21 475-238-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2013-06-21 475-238-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2013-06-06 475-999-8XXX 8000–8999Assigned CSC VOICE, LLC 612K FAIRFIELD CT
2013-05-23 475-282-7XXX 7000–7999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 BRIDGEPORT CT
2013-05-13 475-882-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F HUNTINGTON CT
2013-04-10 475-204-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2013-04-05 475-222-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WATERBURY CT
2013-04-05 475-222-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WATERBURY CT
2013-04-05 475-243-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F ANSONIDRBY CT
2013-04-05 475-243-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F ANSONIDRBY CT
2013-04-05 475-422-7XXX 7000–7999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRIDGEPORT CT
2013-04-05 475-422-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRIDGEPORT CT
2013-04-05 475-444-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NEWTOWN CT
2013-04-05 475-444-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NEWTOWN CT
2013-04-05 475-675-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F SEYMOUR CT
2013-04-05 475-675-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F SEYMOUR CT
2013-04-05 475-882-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F HUNTINGTON CT
2013-04-04 475-212-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NAUGATUCK CT
2013-04-04 475-212-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NAUGATUCK CT
2013-03-18 475-422-9XXX 9000–9999Assigned CSC VOICE, LLC 612K BRIDGEPORT 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.