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
2021-10-13 475-474-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H TRUMBULL CT
2021-10-13 475-474-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H TRUMBULL CT
2021-10-06 475-287-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2021-10-06 475-287-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2021-10-05 475-274-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H GUILFORD CT
2021-10-05 475-294-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C MILFORD CT
2021-10-05 475-294-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C MILFORD CT
2021-10-05 475-294-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C MILFORD CT
2021-10-05 475-294-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C MILFORD CT
2021-10-05 475-302-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2021-10-05 475-302-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2021-10-05 475-302-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2021-10-05 475-302-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2021-10-05 475-304-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2021-10-05 475-304-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2021-10-05 475-304-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2021-10-05 475-304-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C HUNTINGTON CT
2021-10-05 475-308-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2021-10-05 475-309-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2021-10-05 475-309-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2021-10-05 475-309-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2021-10-05 475-309-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C ANSONIDRBY CT
2021-10-05 475-877-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C REDDING CT
2021-10-05 475-877-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C REDDING CT
2021-10-01 475-293-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H WALLINGFD CT
2021-09-30 475-265-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F TRUMBULL CT
2021-09-30 475-274-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H GUILFORD CT
2021-09-29 475-285-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NAUGATUCK CT
2021-09-29 475-315-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2021-09-29 475-474-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F TRUMBULL CT
2021-09-27 475-291-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2021-09-27 475-291-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2021-09-27 475-291-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2021-09-27 475-296-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2021-09-27 475-296-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2021-09-27 475-297-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEWTOWN CT
2021-09-27 475-445-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEWTOWN CT
2021-09-23 475-286-1XXX 1000–1999Assigned COMMIO, LLC 939H BRANFORD CT
2021-09-23 475-286-2XXX 2000–2999Assigned COMMIO, LLC 939H BRANFORD CT
2021-09-23 475-286-3XXX 3000–3999Assigned COMMIO, LLC 939H BRANFORD CT
2021-09-23 475-286-4XXX 4000–4999Assigned COMMIO, LLC 939H BRANFORD CT
2021-09-20 475-287-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2021-09-20 475-688-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MERIDEN CT
2021-09-20 475-755-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWALK CT
2021-09-20 475-755-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2021-09-13 475-274-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H GUILFORD CT
2021-09-09 475-276-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 STAMFORD CT
2021-09-09 475-280-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2021-09-09 475-287-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2021-09-09 475-287-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 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.