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
2009-09-04 203-721-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2009-09-02 203-340-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-09-02 203-340-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-09-02 203-340-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-09-02 203-347-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-09-02 203-347-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-09-02 203-347-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-09-02 203-813-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-09-02 203-813-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-09-02 203-983-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-09-02 203-987-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-08-28 203-490-5XXX 5000–5999Assigned METROPCS, INC. 5562 NAUGATUCK CT
2009-08-20 203-529-3XXX 3000–3999Assigned CSC VOICE, LLC 612K WILTON CT
2009-08-19 203-437-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WATERBURY CT
2009-08-14 203-992-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J GREENWICH CT
2009-07-24 203-689-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J GUILFORD CT
2009-07-23 203-595-4XXX 4000–4999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 STAMFORD CT
2009-07-22 203-701-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MILFORD CT
2009-07-17 203-714-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J NAUGATUCK CT
2009-07-16 203-308-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2009-07-16 203-928-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2009-07-16 203-928-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2009-07-09 203-903-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2009-07-09 203-903-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2009-07-01 203-200-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2009-05-20 203-200-1XXX 1000–1999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2009-05-20 203-200-2XXX 2000–2999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2009-05-20 203-200-3XXX 3000–3999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2009-05-20 203-200-4XXX 4000–4999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2009-05-20 203-200-5XXX 5000–5999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2009-05-20 203-200-6XXX 6000–6999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW HAVEN CT
2009-05-18 203-564-8XXX 8000–8999Assigned AT&T - LOCAL 7421 STAMFORD CT
2009-05-07 203-595-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J STAMFORD CT
2009-05-06 203-548-8XXX 8000–8999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 STAMFORD CT
2009-04-15 203-903-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW HAVEN CT
2009-04-14 203-701-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 MILFORD CT
2009-04-07 203-450-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2009-04-07 203-695-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2009-04-02 203-713-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J MILFORD CT
2009-03-18 203-541-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J STAMFORD CT
2009-03-18 203-779-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J MADISON CT
2009-03-13 203-308-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2009-03-12 203-819-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2009-03-10 203-814-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2009-02-20 203-628-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DANBURY CT
2009-02-10 203-909-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2009-02-10 203-917-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2009-01-27 203-347-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-01-27 203-681-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-01-27 203-681-1XXX 1000–1999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM 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.