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
2009-01-27 203-681-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-01-27 203-813-1XXX 1000–1999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-01-27 203-930-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-01-27 203-987-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-01-27 203-987-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-01-27 203-992-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-01-27 203-992-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-01-27 203-992-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-01-07 203-747-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2009-01-06 203-599-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MERIDEN CT
2008-12-15 203-901-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2008-12-11 203-360-0XXX 0000–0999Assigned METROPCS, INC. 5562 BRIDGEPORT CT
2008-12-11 203-360-1XXX 1000–1999Assigned METROPCS, INC. 5562 BRIDGEPORT CT
2008-12-11 203-360-3XXX 3000–3999Assigned METROPCS, INC. 5562 BRIDGEPORT CT
2008-12-11 203-360-9XXX 9000–9999Assigned METROPCS, INC. 5562 BRIDGEPORT CT
2008-12-05 203-643-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J BRANFORD CT
2008-12-04 203-983-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2008-12-04 203-987-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2008-12-04 203-992-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2008-11-26 203-721-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WATERBURY CT
2008-11-24 203-942-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2008-11-14 203-403-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J RIDGEFIELD CT
2008-11-13 203-293-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WESTPORT CT
2008-11-06 203-297-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2008-10-30 203-208-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRANFORD CT
2008-10-30 203-275-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2008-10-30 203-292-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F FAIRFIELD CT
2008-10-30 203-293-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2008-10-30 203-297-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DANBURY CT
2008-10-30 203-350-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MADISON CT
2008-10-30 203-364-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEWTOWN CT
2008-10-30 203-424-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DARIEN CT
2008-10-30 203-441-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOLCOTT CT
2008-10-30 203-450-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2008-10-30 203-493-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GEORGETOWN CT
2008-10-30 203-513-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F HUNTINGTON CT
2008-10-30 203-514-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MERIDEN CT
2008-10-30 203-516-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F ANSONIDRBY CT
2008-10-30 203-533-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GUILFORD CT
2008-10-30 203-539-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2008-10-30 203-539-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2008-10-30 203-626-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2008-10-30 203-632-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NAUGATUCK CT
2008-10-30 203-665-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WILTON CT
2008-10-30 203-701-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MILFORD CT
2008-10-30 203-716-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW CANAAN CT
2008-10-30 203-744-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DANBURY CT
2008-10-30 203-759-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2008-10-30 203-805-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2008-10-30 203-806-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE 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.