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
2008-09-15 203-960-2XXX 2000–2999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 STAMFORD CT
2008-09-15 203-960-3XXX 3000–3999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 STAMFORD CT
2008-09-15 203-960-4XXX 4000–4999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 STAMFORD CT
2008-09-15 203-960-5XXX 5000–5999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 STAMFORD CT
2008-09-15 203-960-6XXX 6000–6999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 STAMFORD CT
2008-09-15 203-960-7XXX 7000–7999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 STAMFORD CT
2008-09-15 203-960-8XXX 8000–8999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 STAMFORD CT
2008-09-15 203-960-9XXX 9000–9999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 STAMFORD CT
2008-09-10 203-568-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2008-09-10 203-690-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2008-09-10 203-690-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2008-09-09 203-893-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2008-09-08 203-347-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7316 BYRAM CT
2008-09-08 203-930-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7316 GREENWICH CT
2008-09-05 203-589-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2008-09-05 203-690-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 BRIDGEPORT CT
2008-09-04 203-828-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 SEYMOUR CT
2008-09-03 203-936-0XXX 0000–0999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2008-09-03 203-936-1XXX 1000–1999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2008-09-03 203-936-2XXX 2000–2999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2008-09-03 203-936-3XXX 3000–3999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2008-09-03 203-936-4XXX 4000–4999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2008-09-03 203-936-5XXX 5000–5999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2008-08-28 203-617-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J DANBURY CT
2008-08-27 203-513-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J HUNTINGTON CT
2008-08-27 203-553-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2008-08-22 203-897-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2008-08-22 203-897-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2008-08-22 203-897-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2008-08-22 203-897-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2008-08-22 203-897-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2008-08-22 203-897-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2008-08-22 203-897-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2008-08-22 203-897-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2008-08-22 203-897-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2008-08-22 203-897-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2008-08-21 203-524-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAMFORD CT
2008-08-21 203-893-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2008-08-18 203-200-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2008-08-08 203-885-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2008-08-04 203-433-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BRANFORD CT
2008-07-31 203-724-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J STAMFORD CT
2008-07-22 203-721-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2008-07-22 203-909-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2008-07-22 203-909-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2008-07-15 203-297-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 DANBURY CT
2008-07-15 203-909-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW HAVEN CT
2008-07-14 203-617-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 DANBURY CT
2008-07-14 203-689-4XXX 4000–4999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 GUILFORD CT
2008-07-11 203-909-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN 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.