NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

22 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2017-08-23 475-234-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2017-08-23 475-234-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2017-08-23 475-234-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2017-07-27 475-218-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2017-07-25 475-228-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 ANSONIDRBY CT
2017-07-25 475-228-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 ANSONIDRBY CT
2017-07-19 475-333-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2017-07-13 475-393-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NORWALK CT
2017-07-10 475-225-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2017-07-10 475-233-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2017-07-10 475-234-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2017-07-05 475-319-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2017-07-05 475-319-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2017-07-05 475-319-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2017-07-03 475-242-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F REDDING CT
2017-06-28 475-207-0XXX 0000–0999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WOODBURY CT
2017-06-28 475-277-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WILTON CT
2017-06-28 475-279-6XXX 6000–6999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DANBURY CT
2017-06-27 475-313-6XXX 6000–6999Assigned METROPCS, INC. 5562 WATERBURY CT
2017-06-21 475-279-5XXX 5000–5999Assigned METROPCS, INC. 5562 DANBURY CT
2017-06-14 475-897-3XXX 3000–3999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F GREENWICH CT
2017-05-23 475-221-9XXX 9000–9999Assigned TELNYX LLC 073H BRANFORD CT
2017-05-23 475-231-8XXX 8000–8999Assigned TELNYX LLC 073H TRUMBULL CT
2017-05-23 475-269-1XXX 1000–1999Assigned TELNYX LLC 073H HUNTINGTON CT
2017-05-23 475-319-4XXX 4000–4999Assigned METROPCS, INC. 5562 BRIDGEPORT CT
2017-05-23 475-549-2XXX 2000–2999Assigned TELNYX LLC 073H MILFORD CT
2017-05-23 475-558-7XXX 7000–7999Assigned TELNYX LLC 073H NEW CANAAN CT
2017-05-23 475-666-1XXX 1000–1999Assigned TELNYX LLC 073H WESTPORT CT
2017-05-16 475-414-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J NEW HAVEN CT
2017-05-10 475-233-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C WATERBURY CT
2017-05-10 475-234-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2017-05-10 475-266-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2017-05-10 475-322-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2017-05-10 475-333-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C STAMFORD CT
2017-05-10 475-470-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2017-05-10 475-470-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2017-04-17 475-245-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2017-04-17 475-245-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2017-04-17 475-245-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2017-04-17 475-245-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2017-04-17 475-245-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2017-04-17 475-245-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2017-04-17 475-359-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2017-04-17 475-359-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2017-04-17 475-359-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2017-04-17 475-359-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2017-04-11 475-229-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2017-04-11 475-232-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2017-04-03 475-313-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2017-04-03 475-559-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.