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
2023-04-17 475-337-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2023-04-14 475-314-2XXX 2000–2999Assigned BOOST SUBSCRIBERCO L.L.C. 490J HUNTINGTON CT
2023-04-14 475-314-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J HUNTINGTON CT
2023-04-14 475-314-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HUNTINGTON CT
2023-04-14 475-314-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J HUNTINGTON CT
2023-04-14 475-450-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2023-04-14 475-463-2XXX 2000–2999Assigned BOOST SUBSCRIBERCO L.L.C. 490J SEYMOUR CT
2023-04-06 475-763-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C NAUGATUCK CT
2023-03-21 475-303-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GREENWICH CT
2023-02-22 475-297-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NEWTOWN CT
2023-02-22 475-867-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DANBURY CT
2023-02-14 475-318-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2023-01-31 475-307-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MERIDEN CT
2023-01-27 475-310-8XXX 8000–8999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WALLINGFD CT
2023-01-27 475-337-6XXX 6000–6999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WATERBURY CT
2023-01-27 475-832-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WILTON CT
2023-01-13 475-550-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAMFORD CT
2023-01-10 475-317-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2023-01-10 475-317-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2023-01-06 475-296-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2023-01-06 475-317-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2023-01-06 475-339-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2023-01-06 475-339-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2023-01-06 475-339-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2023-01-06 475-467-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 TRUMBULL CT
2023-01-06 475-750-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2023-01-05 475-467-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C TRUMBULL CT
2023-01-05 475-467-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C TRUMBULL CT
2022-12-29 475-337-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2022-12-27 475-290-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2022-12-27 475-550-3XXX 3000–3999Assigned TELNYX LLC 073H STAMFORD CT
2022-12-21 475-673-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C NORWALK CT
2022-12-21 475-673-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C NORWALK CT
2022-12-21 475-673-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C NORWALK CT
2022-12-15 475-622-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WOLCOTT CT
2022-12-14 475-321-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2022-11-30 475-750-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C DANBURY CT
2022-11-30 475-750-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C DANBURY CT
2022-11-30 475-750-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C DANBURY CT
2022-11-30 475-750-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C DANBURY 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
2022-11-22 475-550-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C STAMFORD CT
2022-11-22 475-550-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C STAMFORD CT
2022-11-22 475-550-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C STAMFORD CT
2022-11-22 475-550-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C STAMFORD CT
2022-11-21 475-291-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C NORWALK CT
2022-11-21 475-291-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C NORWALK CT
2022-11-21 475-291-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C NORWALK CT
2022-11-21 475-315-8XXX 8000–8999Assigned COMMIO, LLC 939H CHESHIRE 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.