NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

22 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 14
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
2019-05-09 475-256-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2019-05-09 475-476-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 BRIDGEPORT CT
2019-05-09 475-685-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 STAMFORD CT
2019-05-07 475-257-0XXX 0000–0999Assigned CSC WIRELESS, LLC 425J NORWALK CT
2019-05-07 475-257-1XXX 1000–1999Assigned CSC WIRELESS, LLC 425J NORWALK CT
2019-05-07 475-257-7XXX 7000–7999Assigned CSC WIRELESS, LLC 425J NORWALK CT
2019-05-07 475-257-8XXX 8000–8999Assigned CSC WIRELESS, LLC 425J NORWALK CT
2019-05-07 475-257-9XXX 9000–9999Assigned CSC WIRELESS, LLC 425J NORWALK CT
2019-05-01 475-253-1XXX 1000–1999Assigned TELNYX LLC 073H WALLINGFD CT
2019-04-26 475-701-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J NAUGATUCK CT
2019-04-25 475-269-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2019-04-25 475-400-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2019-04-24 475-215-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J RIDGEFIELD CT
2019-04-24 475-253-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WALLINGFD CT
2019-04-18 475-269-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2019-04-18 475-269-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2019-04-18 475-701-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C NAUGATUCK CT
2019-04-18 475-701-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C NAUGATUCK CT
2019-04-11 475-275-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C BYRAM CT
2019-04-11 475-275-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C BYRAM CT
2019-04-10 475-283-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2019-04-10 475-459-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2019-04-10 475-459-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2019-04-10 475-459-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2019-04-10 475-459-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2019-04-10 475-459-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2019-04-10 475-459-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2019-04-10 475-459-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2019-04-05 475-207-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C WOODBURY CT
2019-04-05 475-207-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C WOODBURY CT
2019-04-05 475-231-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C TRUMBULL CT
2019-04-05 475-231-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C TRUMBULL CT
2019-04-05 475-256-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C DANBURY CT
2019-04-05 475-256-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C DANBURY CT
2019-04-05 475-325-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 GEORGETOWN CT
2019-04-05 475-888-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C FAIRFIELD CT
2019-04-05 475-888-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C FAIRFIELD CT
2019-04-02 475-253-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2019-03-29 475-257-2XXX 2000–2999Assigned CSC WIRELESS, LLC 425J NORWALK CT
2019-03-27 475-476-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2019-03-27 475-476-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2019-03-06 475-244-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2019-03-06 475-244-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2019-03-06 475-244-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2019-03-06 475-244-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2019-03-06 475-739-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WOLCOTT CT
2019-02-28 475-255-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2019-02-28 475-255-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2019-02-28 475-256-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J DANBURY CT
2019-02-28 475-557-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C WATERBURY 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.