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
2010-05-26 203-713-8XXX 8000–8999Assigned CSC VOICE, LLC 612K MILFORD CT
2010-05-26 203-807-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWALK CT
2010-05-19 203-466-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J NEW HAVEN CT
2010-05-13 203-524-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAMFORD CT
2010-05-13 203-524-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAMFORD CT
2010-05-13 203-916-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2010-05-13 203-916-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2010-05-13 203-936-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW HAVEN CT
2010-05-07 203-819-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2010-05-07 203-819-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2010-04-27 203-360-5XXX 5000–5999Assigned METROPCS, INC. 5562 BRIDGEPORT CT
2010-04-27 203-360-6XXX 6000–6999Assigned METROPCS, INC. 5562 BRIDGEPORT CT
2010-04-21 203-937-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NEW HAVEN CT
2010-04-15 203-930-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 GREENWICH CT
2010-04-08 203-819-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2010-04-01 203-807-9XXX 9000–9999Assigned METROPCS, INC. 5562 NORWALK CT
2010-03-19 203-815-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW HAVEN CT
2010-03-11 203-463-0XXX 0000–0999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 SEYMOUR CT
2010-03-08 203-586-6XXX 6000–6999Assigned METROPCS, INC. 5562 WOODBURY CT
2010-03-04 203-916-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 BRIDGEPORT CT
2010-03-03 203-308-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2010-03-03 203-654-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2010-02-22 203-491-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEWTOWN CT
2010-02-19 203-340-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GREENWICH CT
2010-02-19 203-418-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 FAIRFIELD CT
2010-02-19 203-587-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 GEORGETOWN CT
2010-02-19 203-638-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 TRUMBULL CT
2010-02-19 203-962-0XXX 0000–0999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 STAMFORD CT
2010-02-18 203-312-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DANBURY CT
2010-02-18 203-318-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MADISON CT
2010-02-16 203-491-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEWTOWN CT
2010-02-11 203-340-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GREENWICH CT
2010-02-11 203-552-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BYRAM CT
2010-02-04 203-307-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F FAIRFIELD CT
2010-02-02 203-208-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRANFORD CT
2010-02-02 203-441-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOLCOTT CT
2010-02-02 203-465-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2010-02-02 203-493-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GEORGETOWN CT
2010-02-02 203-513-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F HUNTINGTON CT
2010-02-02 203-514-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MERIDEN CT
2010-02-02 203-516-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F ANSONIDRBY CT
2010-02-02 203-527-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2010-02-02 203-533-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GUILFORD CT
2010-02-02 203-632-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NAUGATUCK CT
2010-02-02 203-806-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2010-02-02 203-816-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F TRUMBULL CT
2010-02-02 203-881-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F SEYMOUR CT
2010-01-29 203-293-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2010-01-29 203-423-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WILTON CT
2010-01-29 203-442-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW CANAAN 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.