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
2010-10-01 203-832-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAMFORD CT
2010-10-01 203-832-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAMFORD CT
2010-10-01 203-832-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAMFORD CT
2010-10-01 203-832-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAMFORD CT
2010-09-23 203-821-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2010-09-23 203-941-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F SEYMOUR CT
2010-09-15 203-244-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F RIDGEFIELD CT
2010-09-15 203-267-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOODBURY CT
2010-09-15 203-318-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MADISON CT
2010-09-15 203-344-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F OLDGRNWICH CT
2010-09-15 203-501-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DANBURY CT
2010-09-15 203-594-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW CANAAN CT
2010-09-15 203-651-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2010-09-10 203-726-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2010-09-03 203-421-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MADISON CT
2010-09-03 203-626-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WALLINGFD CT
2010-09-03 203-945-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J NORWALK CT
2010-09-03 203-945-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J NORWALK CT
2010-09-02 203-584-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2010-09-02 203-585-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2010-09-02 203-942-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2010-09-02 203-942-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2010-08-30 203-805-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WATERBURY CT
2010-08-27 203-308-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2010-08-27 203-893-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2010-08-26 203-945-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J NORWALK CT
2010-08-25 203-349-5XXX 5000–5999Assigned CSC VOICE, LLC 612K WESTPORT CT
2010-08-23 203-493-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J GEORGETOWN CT
2010-08-19 203-822-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWALK CT
2010-08-19 203-917-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J DANBURY CT
2010-08-10 203-204-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GUILFORD CT
2010-08-10 203-208-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRANFORD CT
2010-08-10 203-293-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2010-08-10 203-303-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2010-08-10 203-308-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F ANSONIDRBY CT
2010-08-10 203-402-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F HUNTINGTON CT
2010-08-10 203-427-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MERIDEN CT
2010-08-10 203-490-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NAUGATUCK CT
2010-08-10 203-584-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2010-08-10 203-810-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2010-08-10 203-819-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2010-08-02 203-429-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WESTPORT CT
2010-07-30 203-524-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAMFORD CT
2010-07-30 203-524-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAMFORD CT
2010-07-28 203-302-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2010-07-28 203-681-2XXX 2000–2999Assigned CSC VOICE, LLC 612K BYRAM CT
2010-07-28 203-769-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2010-07-26 203-405-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WOODBURY CT
2010-07-21 203-564-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2010-07-16 203-418-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F FAIRFIELD 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.