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
2010-01-29 203-450-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2010-01-29 203-450-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2010-01-29 203-548-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2010-01-29 203-548-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2010-01-29 203-572-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2010-01-29 203-572-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2010-01-29 203-626-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2010-01-29 203-701-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MILFORD CT
2010-01-29 203-794-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DANBURY CT
2010-01-29 203-794-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DANBURY CT
2010-01-29 203-807-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NORWALK CT
2010-01-29 203-807-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NORWALK CT
2010-01-29 203-903-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2010-01-29 203-903-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2010-01-29 203-903-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2010-01-29 203-903-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2010-01-27 203-350-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MADISON CT
2010-01-27 203-424-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DARIEN CT
2010-01-13 203-873-6XXX 6000–6999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 BRIDGEPORT CT
2010-01-11 203-200-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2010-01-11 203-200-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2010-01-11 203-360-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2010-01-11 203-505-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2010-01-07 203-883-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 STAMFORD CT
2010-01-05 203-807-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWALK CT
2009-12-22 203-308-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2009-12-17 203-450-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2009-12-17 203-903-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2009-12-17 203-917-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2009-12-14 203-274-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAMFORD CT
2009-12-14 203-828-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SEYMOUR CT
2009-12-01 203-533-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J GUILFORD CT
2009-11-19 203-880-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TRUMBULL CT
2009-11-06 203-951-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J MILFORD CT
2009-10-30 203-917-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2009-10-29 203-883-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 STAMFORD CT
2009-10-19 203-308-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J ANSONIDRBY CT
2009-10-19 203-614-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J STAMFORD CT
2009-10-09 203-903-5XXX 5000–5999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2009-10-08 203-527-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2009-10-07 203-450-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2009-10-07 203-917-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2009-10-06 203-893-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2009-10-02 203-212-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2009-10-01 203-419-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2009-09-30 203-208-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BRANFORD CT
2009-09-24 203-951-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J MILFORD CT
2009-09-23 203-208-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BRANFORD CT
2009-09-16 203-286-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J NORWALK CT
2009-09-16 203-286-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J NORWALK 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.