NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

5 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2014-03-20 203-666-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2014-03-20 203-679-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2014-03-20 203-818-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2014-03-20 203-818-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2014-03-20 203-850-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2014-03-20 203-914-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-20 203-914-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-20 203-919-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2014-03-20 203-919-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2014-03-20 203-919-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2014-03-20 203-935-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MERIDEN CT
2014-03-20 203-939-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NORWALK CT
2014-03-20 203-952-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NORWALK CT
2014-03-20 203-989-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-20 203-989-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-19 203-290-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C BRIDGEPORT CT
2014-03-19 203-290-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2014-03-19 203-290-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2014-03-19 203-441-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WOLCOTT CT
2014-03-19 203-484-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRANFORD CT
2014-03-19 203-871-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F BRANFORD CT
2014-03-14 203-290-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 BRIDGEPORT CT
2014-03-13 203-350-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MADISON CT
2014-03-13 203-518-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WATERBURY CT
2014-03-13 203-546-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DANBURY CT
2014-03-13 203-693-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MILFORD CT
2014-03-12 203-836-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2014-02-28 203-266-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WOODBURY CT
2014-02-28 203-317-8XXX 8000–8999Assigned METROPCS, INC. 5562 MERIDEN CT
2014-02-28 203-440-8XXX 8000–8999Assigned METROPCS, INC. 5562 MERIDEN CT
2014-02-18 203-965-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J STAMFORD CT
2014-02-11 203-962-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-02-11 203-962-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-02-11 203-989-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-02-11 203-989-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-02-11 203-998-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-02-11 203-998-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-01-16 203-456-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DANBURY CT
2014-01-15 203-408-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F REDDING CT
2014-01-13 203-409-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F OLDGRNWICH CT
2014-01-09 203-357-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2014-01-09 203-518-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2014-01-09 203-518-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2014-01-09 203-518-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2014-01-09 203-529-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WILTON CT
2014-01-09 203-590-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F TRUMBULL CT
2014-01-09 203-633-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOLCOTT CT
2014-01-09 203-689-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GUILFORD CT
2014-01-09 203-693-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C MILFORD CT
2014-01-09 203-699-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.