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
2019-07-19 475-216-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 ANSONIDRBY CT
2019-07-16 475-471-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C WESTPORT CT
2019-07-16 475-471-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C WESTPORT CT
2019-07-16 475-472-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C WILTON CT
2019-07-16 475-472-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C WILTON CT
2019-07-16 475-473-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C WOODBURY CT
2019-07-16 475-473-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C WOODBURY CT
2019-07-16 475-500-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2019-07-16 475-500-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2019-07-16 475-600-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C SEYMOUR CT
2019-07-16 475-600-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C SEYMOUR CT
2019-07-16 475-900-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2019-07-16 475-900-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2019-07-11 475-215-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C RIDGEFIELD CT
2019-07-11 475-215-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C RIDGEFIELD CT
2019-07-11 475-216-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2019-07-11 475-231-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 TRUMBULL CT
2019-07-11 475-242-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C REDDING CT
2019-07-11 475-242-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C REDDING CT
2019-07-11 475-251-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2019-07-11 475-323-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C NEWTOWN CT
2019-07-11 475-323-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C NEWTOWN CT
2019-07-11 475-325-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C GEORGETOWN CT
2019-07-11 475-325-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C GEORGETOWN CT
2019-07-11 475-522-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C MADISON CT
2019-07-11 475-558-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C NEW CANAAN CT
2019-07-11 475-558-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C NEW CANAAN CT
2019-07-09 475-257-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NORWALK CT
2019-06-28 475-255-4XXX 4000–4999Assigned METROPCS, INC. 5562 MERIDEN CT
2019-06-25 475-216-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 ANSONIDRBY CT
2019-06-24 475-262-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 HUNTINGTON CT
2019-06-19 475-277-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WILTON CT
2019-06-10 475-255-5XXX 5000–5999Assigned METROPCS, INC. 5562 MERIDEN CT
2019-06-03 475-253-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WALLINGFD CT
2019-06-03 475-685-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 STAMFORD CT
2019-06-03 475-685-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J STAMFORD CT
2019-05-24 475-262-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F HUNTINGTON CT
2019-05-21 475-739-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C WOLCOTT CT
2019-05-21 475-739-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C WOLCOTT CT
2019-05-16 475-241-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2019-05-16 475-241-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2019-05-16 475-549-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C MILFORD CT
2019-05-16 475-557-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C WATERBURY CT
2019-05-16 475-557-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C WATERBURY CT
2019-05-16 475-685-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C STAMFORD CT
2019-05-16 475-685-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C STAMFORD CT
2019-05-16 475-800-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2019-05-14 475-277-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WILTON 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

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.