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
2021-07-22 475-294-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C MILFORD CT
2021-07-22 475-294-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C MILFORD CT
2021-07-19 475-348-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DANBURY CT
2021-07-19 475-739-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOLCOTT CT
2021-07-16 475-287-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2021-07-12 475-303-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-07-12 475-336-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C DARIEN CT
2021-07-12 475-336-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C DARIEN CT
2021-07-12 475-758-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C NEW CANAAN CT
2021-07-12 475-758-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C NEW CANAAN CT
2021-07-12 475-977-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C STAMFORD CT
2021-07-06 475-272-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C FAIRFIELD CT
2021-07-06 475-272-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C FAIRFIELD CT
2021-07-06 475-285-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C NAUGATUCK CT
2021-07-06 475-285-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C NAUGATUCK CT
2021-07-06 475-285-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C NAUGATUCK CT
2021-07-06 475-285-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C NAUGATUCK CT
2021-07-06 475-330-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C FAIRFIELD CT
2021-07-06 475-330-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C FAIRFIELD CT
2021-07-02 475-258-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NORWALK CT
2021-07-02 475-276-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 STAMFORD CT
2021-07-02 475-280-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2021-07-02 475-280-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2021-07-02 475-280-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2021-07-02 475-312-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2021-06-30 475-293-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J WALLINGFD CT
2021-06-28 475-250-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2021-06-28 475-250-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2021-06-28 475-258-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2021-06-28 475-258-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2021-06-28 475-258-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2021-06-24 475-293-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2021-06-24 475-293-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2021-06-24 475-293-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2021-06-24 475-293-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2021-06-23 475-278-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-06-23 475-278-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-06-23 475-278-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-06-23 475-278-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-06-23 475-280-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2021-06-23 475-280-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2021-06-23 475-280-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2021-06-23 475-280-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2021-06-23 475-286-0XXX 0000–0999Assigned TELNYX LLC 073H BRANFORD CT
2021-06-08 475-295-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2021-06-08 475-312-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2021-06-08 475-312-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2021-06-04 475-260-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2021-06-04 475-260-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2021-06-04 475-260-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C HUNTINGTON 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.