NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 475
TON80 COMMUNICATIONS, LLC 28
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
2022-02-17 475-297-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J NEWTOWN CT
2022-01-27 475-548-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J MERIDEN CT
2022-01-27 475-644-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J GEORGETOWN CT
2022-01-25 475-467-8XXX 8000–8999Assigned TON80 COMMUNICATIONS, LLC 516J TRUMBULL CT
2022-01-25 475-639-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J REDDING CT
2022-01-24 475-382-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J BRANFORD CT
2022-01-18 475-463-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J SEYMOUR CT
2022-01-18 475-763-8XXX 8000–8999Assigned TON80 COMMUNICATIONS, LLC 516J NAUGATUCK CT
2022-01-17 475-622-5XXX 5000–5999Assigned TON80 COMMUNICATIONS, LLC 516J WOLCOTT CT
2022-01-13 475-327-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J MILFORD CT
2022-01-13 475-426-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J RIDGEFIELD CT
2022-01-13 475-466-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J MADISON CT
2022-01-13 475-887-5XXX 5000–5999Assigned TON80 COMMUNICATIONS, LLC 516J WESTPORT CT
2022-01-10 475-673-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J NORWALK CT
2022-01-10 475-832-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J WILTON CT
2022-01-07 475-342-5XXX 5000–5999Assigned TON80 COMMUNICATIONS, LLC 516J ANSONIDRBY CT
2022-01-07 475-746-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J STAMFORD CT
2022-01-06 475-296-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J DANBURY CT
2021-06-30 475-293-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J WALLINGFD CT
2021-06-04 475-278-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J GREENWICH 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
2021-05-25 475-273-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J BRIDGEPORT CT
2021-05-25 475-465-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J OLDGRNWICH CT
2021-05-13 475-264-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J DARIEN CT
2021-05-08 475-272-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J FAIRFIELD CT
2021-05-05 475-263-1XXX 1000–1999Assigned TON80 COMMUNICATIONS, LLC 516J WATERBURY CT
2020-10-30 475-837-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J NEW HAVEN 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.