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
2021-03-24 475-281-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2021-03-23 475-447-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H BYRAM CT
2021-03-18 475-303-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H GREENWICH CT
2021-03-18 475-410-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C WOODBURY CT
2021-03-18 475-410-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C WOODBURY CT
2021-03-18 475-575-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C RIDGEFIELD CT
2021-03-18 475-575-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C RIDGEFIELD CT
2021-03-18 475-600-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C SEYMOUR CT
2021-03-18 475-600-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C SEYMOUR CT
2021-03-12 475-837-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2021-03-12 475-837-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2021-03-02 475-278-3XXX 3000–3999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 GREENWICH CT
2021-02-26 475-837-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J NEW HAVEN CT
2021-02-26 475-837-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J NEW HAVEN CT
2021-02-26 475-837-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J NEW HAVEN CT
2021-02-18 475-260-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H HUNTINGTON CT
2021-02-16 475-410-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H WOODBURY CT
2021-02-10 475-265-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H TRUMBULL CT
2021-02-10 475-270-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H WALLINGFD CT
2021-02-10 475-271-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H MILFORD CT
2021-02-10 475-281-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H ANSONIDRBY CT
2021-02-10 475-284-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H BRIDGEPORT CT
2021-02-10 475-285-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H NAUGATUCK CT
2021-02-10 475-377-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H WATERBURY CT
2021-02-10 475-405-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H CHESHIRE CT
2021-02-10 475-445-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H NEWTOWN CT
2021-02-10 475-454-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H DANBURY CT
2021-02-10 475-472-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H WILTON CT
2021-02-10 475-501-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H GEORGETOWN CT
2021-02-10 475-522-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H MADISON CT
2021-02-10 475-575-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H RIDGEFIELD CT
2021-02-10 475-600-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H SEYMOUR CT
2021-02-10 475-666-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H WESTPORT CT
2021-02-10 475-739-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H WOLCOTT CT
2021-02-10 475-755-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H NORWALK CT
2021-02-10 475-837-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H NEW HAVEN CT
2021-02-10 475-877-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H REDDING CT
2021-02-10 475-946-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H OLDGRNWICH CT
2021-02-08 475-377-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2021-02-05 475-474-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C TRUMBULL CT
2021-02-05 475-474-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C TRUMBULL CT
2021-02-05 475-474-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C TRUMBULL CT
2021-02-05 475-474-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C TRUMBULL CT
2021-02-05 475-474-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C TRUMBULL CT
2021-02-02 475-262-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2021-02-02 475-272-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C FAIRFIELD CT
2021-02-02 475-272-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C FAIRFIELD CT
2021-02-02 475-281-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2021-02-02 475-281-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2021-02-02 475-285-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C NAUGATUCK 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.