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
2020-06-08 475-500-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2020-06-08 475-558-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C NEW CANAAN CT
2020-06-08 475-701-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C NAUGATUCK CT
2020-06-08 475-900-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2020-06-08 475-900-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2020-06-08 475-900-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2020-06-05 475-255-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2020-06-05 475-255-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2020-06-05 475-258-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C NORWALK CT
2020-06-05 475-258-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C NORWALK CT
2020-06-05 475-330-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C FAIRFIELD CT
2020-06-05 475-330-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C FAIRFIELD CT
2020-06-05 475-338-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C BRANFORD CT
2020-06-05 475-472-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C WILTON CT
2020-06-05 475-472-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C WILTON CT
2020-06-05 475-476-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2020-06-05 475-476-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2020-06-05 475-522-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C MADISON CT
2020-06-05 475-600-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C SEYMOUR CT
2020-06-05 475-600-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C SEYMOUR CT
2020-06-05 475-739-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C WOLCOTT CT
2020-06-05 475-739-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C WOLCOTT CT
2020-06-03 475-272-9XXX 9000–9999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 FAIRFIELD CT
2020-05-29 475-270-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2020-05-29 475-405-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C CHESHIRE CT
2020-05-29 475-405-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C CHESHIRE CT
2020-05-29 475-405-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C CHESHIRE CT
2020-05-26 475-252-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C BYRAM CT
2020-05-26 475-252-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C BYRAM CT
2020-05-26 475-252-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C BYRAM CT
2020-05-26 475-253-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2020-05-26 475-267-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2020-05-26 475-267-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2020-05-26 475-267-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2020-05-26 475-348-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C DANBURY CT
2020-05-26 475-348-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C DANBURY CT
2020-05-19 475-348-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DANBURY CT
2020-05-14 475-575-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C RIDGEFIELD CT
2020-05-14 475-575-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C RIDGEFIELD CT
2020-05-11 475-254-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2020-05-06 475-557-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2020-04-24 475-242-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C REDDING CT
2020-04-24 475-242-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C REDDING CT
2020-04-24 475-242-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C REDDING CT
2020-04-24 475-251-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2020-04-24 475-251-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2020-04-24 475-262-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HUNTINGTON CT
2020-04-24 475-262-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HUNTINGTON CT
2020-04-24 475-264-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C DARIEN CT
2020-04-24 475-264-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C DARIEN 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.