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
2020-04-24 475-265-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C TRUMBULL CT
2020-04-24 475-265-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C TRUMBULL CT
2020-04-24 475-269-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2020-04-23 475-900-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GUILFORD CT
2020-04-15 475-348-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DANBURY CT
2020-04-09 475-701-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NAUGATUCK CT
2020-04-09 475-701-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NAUGATUCK CT
2020-03-30 475-267-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2020-03-30 475-267-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2020-03-30 475-267-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2020-03-24 475-889-4XXX 4000–4999Assigned CSC WIRELESS, LLC 425J NORWALK CT
2020-03-24 475-889-5XXX 5000–5999Assigned CSC WIRELESS, LLC 425J NORWALK CT
2020-03-23 475-261-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2020-03-23 475-261-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2020-03-19 475-348-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2020-03-17 475-262-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HUNTINGTON CT
2020-03-12 475-268-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F STAMFORD CT
2020-03-11 475-264-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DARIEN CT
2020-03-11 475-473-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WOODBURY CT
2020-03-11 475-500-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F GREENWICH CT
2020-02-18 475-263-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J WATERBURY CT
2020-02-14 475-268-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 STAMFORD CT
2020-02-12 475-265-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F TRUMBULL CT
2020-02-12 475-476-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BRIDGEPORT CT
2020-02-11 475-216-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2020-02-11 475-256-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2020-02-06 475-265-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F TRUMBULL CT
2020-02-03 475-252-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C BYRAM CT
2020-02-03 475-252-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C BYRAM CT
2020-02-03 475-400-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C STAMFORD CT
2020-02-03 475-477-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C STAMFORD CT
2020-02-03 475-500-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2020-02-03 475-500-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2020-01-31 475-216-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2020-01-31 475-216-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2020-01-31 475-242-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C REDDING CT
2020-01-31 475-242-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C REDDING CT
2020-01-31 475-253-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2020-01-31 475-253-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2020-01-31 475-256-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C DANBURY CT
2020-01-31 475-256-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C DANBURY CT
2020-01-29 475-237-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DANBURY CT
2020-01-29 475-242-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F REDDING CT
2020-01-29 475-261-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NEW HAVEN CT
2020-01-29 475-261-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2020-01-29 475-889-6XXX 6000–6999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NORWALK CT
2020-01-25 475-216-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2020-01-25 475-476-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2020-01-25 475-476-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2020-01-25 475-477-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F 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.