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
2018-10-17 475-244-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C CHESHIRE CT
2018-10-17 475-244-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C CHESHIRE CT
2018-10-17 475-259-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C DARIEN CT
2018-10-17 475-259-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C DARIEN CT
2018-10-08 475-255-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MERIDEN CT
2018-10-08 475-255-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MERIDEN CT
2018-10-05 475-231-2XXX 2000–2999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F TRUMBULL CT
2018-10-05 475-259-1XXX 1000–1999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F DARIEN CT
2018-10-05 475-275-3XXX 3000–3999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F BYRAM CT
2018-10-03 475-701-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J NAUGATUCK CT
2018-09-27 475-241-8XXX 8000–8999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2018-09-27 475-325-3XXX 3000–3999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F GEORGETOWN CT
2018-09-27 475-549-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F MILFORD CT
2018-09-27 475-666-2XXX 2000–2999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WESTPORT CT
2018-09-27 475-666-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C WESTPORT CT
2018-09-27 475-800-2XXX 2000–2999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2018-09-27 475-800-3XXX 3000–3999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2018-09-24 475-701-3XXX 3000–3999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NAUGATUCK CT
2018-09-20 475-252-6XXX 6000–6999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 BYRAM CT
2018-09-18 475-241-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2018-09-18 475-251-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 ANSONIDRBY CT
2018-09-17 475-685-6XXX 6000–6999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F STAMFORD CT
2018-09-14 475-241-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2018-09-12 475-775-3XXX 3000–3999Assigned METROPCS, INC. 5562 MERIDEN CT
2018-09-11 475-251-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2018-09-06 475-251-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2018-08-30 475-241-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2018-08-28 475-236-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2018-08-27 475-233-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WATERBURY CT
2018-08-23 475-236-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2018-08-22 475-323-3XXX 3000–3999Assigned METROPCS, INC. 5562 NEWTOWN CT
2018-08-22 475-439-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2018-08-21 475-241-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2018-08-21 475-241-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2018-08-21 475-333-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2018-08-16 475-775-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F MERIDEN CT
2018-08-09 475-897-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2018-08-01 475-558-6XXX 6000–6999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NEW CANAAN CT
2018-07-30 475-359-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2018-07-25 475-250-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2018-07-19 475-233-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2018-07-11 475-241-9XXX 9000–9999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2018-07-09 475-234-7XXX 7000–7999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2018-07-09 475-300-1XXX 1000–1999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2018-07-09 475-300-9XXX 9000–9999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2018-07-09 475-800-4XXX 4000–4999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2018-07-09 475-800-5XXX 5000–5999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2018-07-09 475-800-6XXX 6000–6999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2018-07-09 475-800-7XXX 7000–7999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2018-07-09 475-800-9XXX 9000–9999Assigned METROPCS, INC. 5562 NEW HAVEN 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.