NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

5 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 203
ONVOY, LLC - CT 5
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
2008-07-11 203-909-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2008-07-11 203-909-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2008-07-11 203-909-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2008-07-08 203-450-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2008-07-08 203-823-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2008-07-08 203-823-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2008-06-27 203-939-1XXX 1000–1999Assigned CSC VOICE, LLC 612K NORWALK CT
2008-06-25 203-745-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2008-06-24 203-893-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2008-06-17 203-285-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2008-06-17 203-503-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2008-06-17 203-572-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2008-06-12 203-992-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J GREENWICH CT
2008-06-06 203-681-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2008-06-06 203-769-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2008-06-06 203-813-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2008-06-06 203-813-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2008-06-06 203-983-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2008-06-06 203-987-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2008-06-05 203-769-8XXX 8000–8999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 GREENWICH CT
2008-06-04 203-974-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2008-05-28 203-721-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WATERBURY CT
2008-05-27 203-419-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2008-05-27 203-433-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BRANFORD CT
2008-05-27 203-443-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 MERIDEN CT
2008-05-27 203-463-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEYMOUR CT
2008-05-27 203-466-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2008-05-27 203-497-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NEW HAVEN CT
2008-05-27 203-548-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 STAMFORD CT
2008-05-27 203-690-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2008-05-27 203-690-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2008-05-27 203-893-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2008-05-27 203-893-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ANSONIDRBY CT
2008-05-27 203-919-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NORWALK CT
2008-05-15 203-450-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2008-05-15 203-450-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2008-05-15 203-909-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2008-05-15 203-909-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2008-05-12 203-220-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 TRUMBULL CT
2008-05-12 203-992-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 GREENWICH CT
2008-05-08 203-806-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 CHESHIRE CT
2008-05-07 203-204-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 GUILFORD CT
2008-05-07 203-427-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 MERIDEN CT
2008-05-06 203-304-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEWTOWN CT
2008-05-05 203-433-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 BRANFORD CT
2008-05-05 203-660-1XXX 1000–1999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2008-05-05 203-660-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2008-05-05 203-930-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2008-05-05 203-971-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2008-05-01 203-350-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 MADISON 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.