NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

25 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 17
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
2023-09-14 475-288-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C NORWALK CT
2023-09-13 475-318-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2023-09-13 475-375-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2023-09-13 475-375-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2023-09-13 475-375-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2023-09-06 475-340-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C OLDGRNWICH CT
2023-08-31 475-326-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2023-08-31 475-326-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2023-08-23 475-334-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C STAMFORD CT
2023-08-23 475-334-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C STAMFORD CT
2023-08-23 475-334-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C STAMFORD CT
2023-08-15 475-304-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2023-08-09 475-466-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F MADISON CT
2023-08-09 475-867-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DANBURY CT
2023-08-09 475-887-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WESTPORT CT
2023-08-09 475-888-5XXX 5000–5999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F FAIRFIELD CT
2023-08-01 475-450-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2023-07-26 475-335-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2023-07-21 475-850-2XXX 2000–2999Assigned CSC WIRELESS, LLC 425J NORWALK CT
2023-07-21 475-850-3XXX 3000–3999Assigned CSC WIRELESS, LLC 425J NORWALK CT
2023-07-20 475-274-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2023-07-20 475-382-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C BRANFORD CT
2023-07-20 475-382-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C BRANFORD CT
2023-07-20 475-382-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C BRANFORD CT
2023-07-20 475-410-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C WOODBURY CT
2023-07-20 475-410-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C WOODBURY CT
2023-07-20 475-426-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C RIDGEFIELD CT
2023-07-20 475-426-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C RIDGEFIELD CT
2023-07-20 475-426-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C RIDGEFIELD CT
2023-07-20 475-426-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C RIDGEFIELD CT
2023-07-20 475-463-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C SEYMOUR CT
2023-07-20 475-463-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C SEYMOUR CT
2023-07-20 475-463-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C SEYMOUR CT
2023-07-20 475-548-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2023-07-20 475-548-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2023-07-20 475-548-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2023-07-20 475-548-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2023-07-20 475-548-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2023-07-20 475-548-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2023-07-20 475-548-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2023-07-20 475-548-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2023-07-20 475-548-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2023-07-20 475-763-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C NAUGATUCK CT
2023-07-20 475-763-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C NAUGATUCK CT
2023-07-20 475-763-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C NAUGATUCK CT
2023-07-20 475-763-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C NAUGATUCK CT
2023-07-20 475-887-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C WESTPORT CT
2023-07-20 475-887-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C WESTPORT CT
2023-07-20 475-887-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C WESTPORT CT
2023-07-20 475-887-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C WESTPORT 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.