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
2022-11-21 475-339-0XXX 0000–0999Assigned COMMIO, LLC 939H ANSONIDRBY CT
2022-11-16 475-310-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WALLINGFD CT
2022-11-07 475-356-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT 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
2022-10-27 475-450-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2022-10-12 475-356-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2022-10-07 475-321-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2022-10-07 475-321-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2022-10-07 475-321-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2022-09-27 475-307-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MERIDEN CT
2022-09-27 475-550-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAMFORD CT
2022-09-26 475-337-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2022-09-26 475-337-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2022-09-26 475-337-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2022-09-26 475-639-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F REDDING CT
2022-09-26 475-639-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F REDDING CT
2022-09-26 475-639-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F REDDING CT
2022-09-26 475-639-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F REDDING CT
2022-09-26 475-639-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F REDDING CT
2022-09-25 475-467-7XXX 7000–7999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F TRUMBULL CT
2022-09-16 475-297-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWTOWN CT
2022-09-16 475-316-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2022-09-16 475-316-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2022-09-16 475-316-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2022-09-16 475-342-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 ANSONIDRBY CT
2022-09-13 475-321-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2022-09-13 475-321-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2022-09-13 475-321-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2022-09-13 475-321-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2022-09-13 475-321-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2022-09-13 475-867-5XXX 5000–5999Assigned COMMIO, LLC 939H DANBURY CT
2022-09-08 475-946-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C OLDGRNWICH CT
2022-09-06 475-277-9XXX 9000–9999Assigned TERRA NOVA TELECOM INC. 145J WILTON CT
2022-09-06 475-323-5XXX 5000–5999Assigned TERRA NOVA TELECOM INC. 145J NEWTOWN CT
2022-09-02 475-291-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2022-09-02 475-291-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2022-09-02 475-291-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2022-08-30 475-306-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2022-08-30 475-306-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2022-08-30 475-356-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2022-08-30 475-356-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2022-08-30 475-450-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2022-08-30 475-450-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2022-08-30 475-450-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2022-08-30 475-480-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2022-08-30 475-480-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2022-08-29 475-306-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2022-08-29 475-306-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2022-08-23 475-296-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY 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.