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
2014-06-02 203-689-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GUILFORD CT
2014-06-02 203-896-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MADISON CT
2014-06-02 203-973-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2014-06-02 203-978-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2014-06-02 203-998-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2014-06-02 203-998-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2014-05-21 203-707-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2014-05-21 203-707-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2014-05-16 203-587-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GEORGETOWN CT
2014-05-02 203-818-0XXX 0000–0999Assigned METROPCS, INC. 5562 NORWALK CT
2014-04-17 203-447-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HUNTINGTON CT
2014-04-17 203-604-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWALK CT
2014-04-17 203-613-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWALK CT
2014-04-17 203-694-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MERIDEN CT
2014-04-16 203-890-9XXX 9000–9999Assigned CSC VOICE, LLC 612K STAMFORD CT
2014-04-08 203-489-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GREENWICH CT
2014-04-04 203-290-5XXX 5000–5999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 BRIDGEPORT CT
2014-04-03 203-857-1XXX 1000–1999Assigned CSC VOICE, LLC 612K NORWALK CT
2014-04-02 203-290-4XXX 4000–4999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2014-04-02 203-571-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2014-04-02 203-571-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2014-03-31 203-299-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2014-03-31 203-299-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2014-03-31 203-883-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-31 203-883-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-31 203-905-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-31 203-905-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-31 203-905-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-31 203-952-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2014-03-31 203-957-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2014-03-31 203-957-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2014-03-31 203-962-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-31 203-962-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-31 203-965-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-31 203-968-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-31 203-968-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-28 203-580-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BYRAM CT
2014-03-27 203-267-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOODBURY CT
2014-03-20 203-309-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F DARIEN CT
2014-03-20 203-392-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2014-03-20 203-397-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2014-03-20 203-403-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F RIDGEFIELD CT
2014-03-20 203-479-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2014-03-20 203-479-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW HAVEN CT
2014-03-20 203-489-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GREENWICH CT
2014-03-20 203-609-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-20 203-609-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-20 203-609-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-03-20 203-666-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2014-03-20 203-666-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT 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.