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
2021-01-06 475-312-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2021-01-06 475-377-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2021-01-06 475-837-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2020-12-09 475-261-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2020-12-08 475-281-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2020-12-08 475-281-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2020-12-08 475-281-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2020-12-07 475-271-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 MILFORD CT
2020-12-07 475-274-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 GUILFORD CT
2020-12-02 475-284-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2020-12-02 475-284-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2020-12-02 475-455-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2020-12-02 475-688-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2020-12-02 475-688-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2020-12-02 475-766-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2020-12-02 475-766-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2020-11-06 475-258-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NORWALK CT
2020-11-06 475-688-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 MERIDEN CT
2020-11-02 475-766-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2020-10-30 475-312-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2020-10-30 475-312-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2020-10-30 475-312-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2020-10-30 475-837-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J NEW HAVEN CT
2020-10-28 475-284-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2020-10-28 475-319-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2020-10-27 475-454-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C DANBURY CT
2020-10-27 475-454-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C DANBURY CT
2020-10-23 475-265-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C TRUMBULL CT
2020-10-23 475-265-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C TRUMBULL CT
2020-10-23 475-270-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2020-10-23 475-271-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C MILFORD CT
2020-10-23 475-272-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C FAIRFIELD CT
2020-10-23 475-272-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C FAIRFIELD CT
2020-10-23 475-336-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C DARIEN CT
2020-10-23 475-336-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C DARIEN CT
2020-10-23 475-445-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C NEWTOWN CT
2020-10-23 475-445-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C NEWTOWN CT
2020-10-23 475-471-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C WESTPORT CT
2020-10-23 475-471-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C WESTPORT CT
2020-10-23 475-471-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C WESTPORT CT
2020-10-23 475-471-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C WESTPORT CT
2020-10-23 475-473-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C WOODBURY CT
2020-10-23 475-473-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C WOODBURY CT
2020-10-23 475-473-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C WOODBURY CT
2020-10-23 475-755-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C NORWALK CT
2020-10-23 475-755-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C NORWALK CT
2020-10-23 475-755-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C NORWALK CT
2020-10-23 475-946-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C OLDGRNWICH CT
2020-10-23 475-946-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C OLDGRNWICH CT
2020-10-23 475-977-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C 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.