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
2021-06-04 475-260-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2021-06-04 475-278-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J GREENWICH CT
2021-06-04 475-766-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2021-06-04 475-766-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2021-06-04 475-766-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2021-06-04 475-766-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2021-06-01 475-274-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J GUILFORD CT
2021-05-27 475-758-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J NEW CANAAN CT
2021-05-26 475-254-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2021-05-26 475-261-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2021-05-26 475-261-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2021-05-25 475-273-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J BRIDGEPORT CT
2021-05-25 475-465-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J OLDGRNWICH CT
2021-05-20 475-348-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 DANBURY CT
2021-05-18 475-237-9XXX 9000–9999Assigned VONAGE AMERICA LLC 197D DANBURY CT
2021-05-18 475-277-5XXX 5000–5999Assigned VONAGE AMERICA LLC 197D WILTON CT
2021-05-18 475-348-5XXX 5000–5999Assigned VONAGE AMERICA LLC 197D DANBURY CT
2021-05-18 475-359-5XXX 5000–5999Assigned VONAGE AMERICA LLC 197D STAMFORD CT
2021-05-18 475-472-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D WILTON CT
2021-05-18 475-755-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D NORWALK CT
2021-05-18 475-755-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D NORWALK CT
2021-05-18 475-977-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D STAMFORD CT
2021-05-13 475-264-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J DARIEN CT
2021-05-10 475-977-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 STAMFORD CT
2021-05-08 475-272-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J FAIRFIELD CT
2021-05-05 475-260-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2021-05-05 475-260-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2021-05-05 475-260-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2021-05-05 475-260-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2021-05-05 475-263-1XXX 1000–1999Assigned TON80 COMMUNICATIONS, LLC 516J WATERBURY CT
2021-05-05 475-270-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2021-05-05 475-270-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2021-05-05 475-295-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WATERBURY CT
2021-05-05 475-447-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C BYRAM CT
2021-05-05 475-447-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C BYRAM CT
2021-05-05 475-575-3XXX 3000–3999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F RIDGEFIELD CT
2021-04-27 475-295-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2021-04-26 475-377-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2021-04-19 475-405-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2021-04-19 475-405-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2021-04-14 475-278-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-04-14 475-278-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-04-14 475-278-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-04-14 475-278-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-04-14 475-447-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C BYRAM CT
2021-04-14 475-447-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C BYRAM CT
2021-04-14 475-688-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 MERIDEN CT
2021-03-30 475-280-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2021-03-30 475-280-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2021-03-24 475-281-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY 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.