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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2021-02-02 475-285-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C NAUGATUCK CT
2021-02-02 475-336-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C DARIEN CT
2021-02-02 475-336-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C DARIEN CT
2021-02-02 475-338-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C BRANFORD CT
2021-02-02 475-338-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C BRANFORD CT
2021-02-02 475-405-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C CHESHIRE CT
2021-02-02 475-405-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C CHESHIRE CT
2021-02-02 475-445-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C NEWTOWN CT
2021-02-02 475-445-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C NEWTOWN CT
2021-02-02 475-471-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C WESTPORT CT
2021-02-02 475-471-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C WESTPORT CT
2021-02-02 475-472-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C WILTON CT
2021-02-02 475-472-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C WILTON CT
2021-02-02 475-501-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C GEORGETOWN CT
2021-02-02 475-501-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C GEORGETOWN CT
2021-02-02 475-522-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C MADISON CT
2021-02-02 475-522-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C MADISON CT
2021-02-02 475-739-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C WOLCOTT CT
2021-02-02 475-758-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C NEW CANAAN CT
2021-02-02 475-758-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C NEW CANAAN CT
2021-02-02 475-877-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C REDDING CT
2021-02-01 475-271-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C MILFORD CT
2021-02-01 475-271-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C MILFORD CT
2021-02-01 475-271-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C MILFORD CT
2021-02-01 475-271-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C MILFORD CT
2021-02-01 475-377-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C WATERBURY CT
2021-02-01 475-377-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C WATERBURY CT
2021-02-01 475-377-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C WATERBURY CT
2021-02-01 475-377-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C WATERBURY CT
2021-02-01 475-454-0XXX 0000–0999Assigned TELNYX LLC 073H DANBURY CT
2021-01-29 475-270-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2021-01-29 475-270-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2021-01-29 475-270-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2021-01-29 475-270-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2021-01-21 475-837-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2021-01-21 475-837-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2021-01-20 475-284-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2021-01-20 475-284-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2021-01-20 475-284-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2021-01-20 475-284-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2021-01-20 475-454-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C DANBURY CT
2021-01-20 475-454-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C DANBURY CT
2021-01-20 475-454-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C DANBURY CT
2021-01-20 475-454-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C DANBURY CT
2021-01-20 475-454-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C DANBURY CT
2021-01-13 475-303-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-01-13 475-303-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-01-13 475-303-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-01-13 475-303-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-01-06 475-312-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT 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.