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
2022-05-11 475-342-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 ANSONIDRBY CT
2022-05-09 475-310-7XXX 7000–7999Assigned BARR TEL USA, INC. - CT 866H WALLINGFD CT
2022-05-09 475-544-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWALK CT
2022-05-03 475-315-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHESHIRE CT
2022-04-26 475-339-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2022-04-26 475-339-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2022-04-25 475-304-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HUNTINGTON CT
2022-04-25 475-307-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 MERIDEN CT
2022-04-25 475-342-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2022-04-25 475-746-3XXX 3000–3999Assigned METROPCS, INC. 5562 STAMFORD CT
2022-03-25 475-332-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H BRIDGEPORT CT
2022-03-25 475-356-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 BRIDGEPORT CT
2022-03-21 475-296-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2022-03-21 475-296-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2022-03-21 475-296-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2022-03-21 475-296-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2022-03-09 475-356-7XXX 7000–7999Assigned FRACTEL, LLC 965H BRIDGEPORT CT
2022-03-09 475-356-9XXX 9000–9999Assigned FRACTEL, LLC 965H BRIDGEPORT CT
2022-03-08 475-316-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2022-03-08 475-316-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2022-03-08 475-316-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2022-03-02 475-450-1XXX 1000–1999Assigned BARR TEL USA, INC. - CT 866H BRIDGEPORT CT
2022-03-02 475-480-1XXX 1000–1999Assigned BARR TEL USA, INC. - CT 866H NEW HAVEN CT
2022-03-02 475-550-1XXX 1000–1999Assigned BARR TEL USA, INC. - CT 866H STAMFORD CT
2022-03-02 475-750-1XXX 1000–1999Assigned BARR TEL USA, INC. - CT 866H DANBURY CT
2022-03-02 475-850-1XXX 1000–1999Assigned BARR TEL USA, INC. - CT 866H NORWALK CT
2022-02-25 475-466-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F MADISON CT
2022-02-25 475-467-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 TRUMBULL CT
2022-02-23 475-351-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2022-02-23 475-746-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H STAMFORD CT
2022-02-23 475-746-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H STAMFORD CT
2022-02-18 475-359-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAMFORD CT
2022-02-17 475-297-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J NEWTOWN CT
2022-02-08 475-332-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2022-02-08 475-332-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2022-02-08 475-332-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2022-02-08 475-622-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H WOLCOTT CT
2022-02-08 475-622-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H WOLCOTT CT
2022-02-05 475-320-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H ANSONIDRBY CT
2022-02-05 475-320-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H ANSONIDRBY CT
2022-01-27 475-548-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J MERIDEN CT
2022-01-27 475-644-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J GEORGETOWN CT
2022-01-25 475-467-8XXX 8000–8999Assigned TON80 COMMUNICATIONS, LLC 516J TRUMBULL CT
2022-01-25 475-639-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J REDDING CT
2022-01-24 475-307-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H MERIDEN CT
2022-01-24 475-327-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H MILFORD CT
2022-01-24 475-327-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H MILFORD CT
2022-01-24 475-336-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H DARIEN CT
2022-01-24 475-336-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H DARIEN CT
2022-01-24 475-342-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY 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.