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
2021-11-21 475-305-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2021-11-21 475-739-4XXX 4000–4999Assigned TELNYX LLC 073H WOLCOTT CT
2021-11-19 475-297-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEWTOWN CT
2021-11-19 475-301-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2021-11-19 475-301-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2021-11-19 475-307-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 MERIDEN CT
2021-11-19 475-307-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 MERIDEN CT
2021-11-19 475-308-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2021-11-19 475-308-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2021-11-19 475-308-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2021-11-19 475-308-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2021-11-18 475-310-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2021-11-18 475-310-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2021-11-17 475-600-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F SEYMOUR CT
2021-11-17 475-600-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F SEYMOUR CT
2021-11-10 475-286-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H BRANFORD CT
2021-11-10 475-286-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H BRANFORD CT
2021-11-10 475-304-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H HUNTINGTON CT
2021-11-10 475-304-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H HUNTINGTON CT
2021-11-10 475-888-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H FAIRFIELD CT
2021-11-10 475-888-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H FAIRFIELD CT
2021-11-05 475-306-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2021-11-05 475-306-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2021-11-05 475-306-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2021-11-05 475-306-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2021-11-05 475-306-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2021-11-05 475-306-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2021-10-26 475-294-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H MILFORD CT
2021-10-26 475-294-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H MILFORD CT
2021-10-26 475-302-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2021-10-26 475-302-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2021-10-26 475-302-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2021-10-26 475-302-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2021-10-26 475-302-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2021-10-26 475-308-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2021-10-26 475-308-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2021-10-26 475-308-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2021-10-26 475-758-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW CANAAN CT
2021-10-26 475-758-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW CANAAN CT
2021-10-25 475-293-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2021-10-25 475-293-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2021-10-25 475-688-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2021-10-25 475-688-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2021-10-25 475-688-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2021-10-25 475-688-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C MERIDEN CT
2021-10-19 475-276-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H STAMFORD CT
2021-10-19 475-276-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H STAMFORD CT
2021-10-19 475-276-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H STAMFORD CT
2021-10-13 475-297-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEWTOWN CT
2021-10-13 475-297-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEWTOWN 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.