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
TELNYX LLC 44
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
2024-11-22 475-370-9XXX 9000–9999Assigned TELNYX LLC 073H DANBURY CT
2024-06-08 475-370-8XXX 8000–8999Assigned TELNYX LLC 073H DANBURY CT
2022-12-27 475-550-3XXX 3000–3999Assigned TELNYX LLC 073H STAMFORD CT
2022-11-28 475-321-5XXX 5000–5999Assigned TELNYX LLC 073H NEW HAVEN CT
2022-11-28 475-337-0XXX 0000–0999Assigned TELNYX LLC 073H WATERBURY CT
2022-11-02 475-356-3XXX 3000–3999Assigned TELNYX LLC 073H BRIDGEPORT CT
2022-11-02 475-467-2XXX 2000–2999Assigned TELNYX LLC 073H TRUMBULL CT
2021-11-21 475-739-4XXX 4000–4999Assigned TELNYX LLC 073H WOLCOTT CT
2021-06-23 475-286-0XXX 0000–0999Assigned TELNYX LLC 073H BRANFORD CT
2021-02-01 475-454-0XXX 0000–0999Assigned TELNYX LLC 073H DANBURY CT
2020-09-16 475-575-0XXX 0000–0999Assigned TELNYX LLC 073H RIDGEFIELD CT
2020-09-01 475-473-1XXX 1000–1999Assigned TELNYX LLC 073H WOODBURY CT
2019-10-01 475-252-0XXX 0000–0999Assigned TELNYX LLC 073H BYRAM CT
2019-07-30 475-900-0XXX 0000–0999Assigned TELNYX LLC 073H GUILFORD CT
2019-05-14 475-701-8XXX 8000–8999Assigned TELNYX LLC 073H NAUGATUCK CT
2019-05-10 475-897-6XXX 6000–6999Assigned TELNYX LLC 073H GREENWICH CT
2019-05-01 475-253-1XXX 1000–1999Assigned TELNYX LLC 073H WALLINGFD CT
2018-04-27 475-242-9XXX 9000–9999Assigned TELNYX LLC 073H REDDING CT
2018-04-20 475-207-9XXX 9000–9999Assigned TELNYX LLC 073H WOODBURY CT
2018-04-20 475-215-9XXX 9000–9999Assigned TELNYX LLC 073H RIDGEFIELD CT
2018-04-20 475-219-8XXX 8000–8999Assigned TELNYX LLC 073H WOLCOTT CT
2018-04-20 475-244-0XXX 0000–0999Assigned TELNYX LLC 073H CHESHIRE CT
2018-04-20 475-277-8XXX 8000–8999Assigned TELNYX LLC 073H WILTON CT
2018-04-20 475-323-1XXX 1000–1999Assigned TELNYX LLC 073H NEWTOWN CT
2018-04-20 475-325-7XXX 7000–7999Assigned TELNYX LLC 073H GEORGETOWN CT
2018-04-20 475-522-8XXX 8000–8999Assigned TELNYX LLC 073H MADISON CT
2018-04-20 475-675-6XXX 6000–6999Assigned TELNYX LLC 073H SEYMOUR CT
2017-05-23 475-221-9XXX 9000–9999Assigned TELNYX LLC 073H BRANFORD CT
2017-05-23 475-231-8XXX 8000–8999Assigned TELNYX LLC 073H TRUMBULL CT
2017-05-23 475-269-1XXX 1000–1999Assigned TELNYX LLC 073H HUNTINGTON CT
2017-05-23 475-549-2XXX 2000–2999Assigned TELNYX LLC 073H MILFORD CT
2017-05-23 475-558-7XXX 7000–7999Assigned TELNYX LLC 073H NEW CANAAN CT
2017-05-23 475-666-1XXX 1000–1999Assigned TELNYX LLC 073H WESTPORT CT
2017-03-27 475-225-2XXX 2000–2999Assigned TELNYX LLC 073H BRIDGEPORT CT
2017-03-27 475-233-0XXX 0000–0999Assigned TELNYX LLC 073H WATERBURY CT
2017-03-27 475-245-0XXX 0000–0999Assigned TELNYX LLC 073H NORWALK CT
2017-03-27 475-328-8XXX 8000–8999Assigned TELNYX LLC 073H DARIEN CT
2017-03-27 475-330-9XXX 9000–9999Assigned TELNYX LLC 073H FAIRFIELD CT
2017-03-27 475-465-8XXX 8000–8999Assigned TELNYX LLC 073H OLDGRNWICH CT
2017-03-27 475-731-6XXX 6000–6999Assigned TELNYX LLC 073H ANSONIDRBY CT
2017-03-27 475-775-2XXX 2000–2999Assigned TELNYX LLC 073H MERIDEN CT
2017-02-28 475-333-3XXX 3000–3999Assigned TELNYX LLC 073H STAMFORD CT
2017-02-24 475-218-4XXX 4000–4999Assigned TELNYX LLC 073H DANBURY CT
2016-12-06 475-234-1XXX 1000–1999Assigned TELNYX LLC 073H 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.