NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 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, all time — NPA 408
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 75
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
2016-08-02 408-861-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2016-08-02 408-878-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2013-06-18 408-831-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2013-06-18 408-831-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2013-02-20 408-769-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SUNNYVALE CA
2012-09-28 408-610-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2012-06-22 408-606-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2012-06-22 408-606-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2012-06-08 408-620-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS SOUTH CA
2011-12-16 408-638-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2011-11-17 408-643-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS NORTH CA
2011-11-17 408-643-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS NORTH CA
2011-10-17 408-498-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SUNNYVALE CA
2011-08-22 408-477-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2011-02-25 408-766-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS SOUTH CA
2011-02-25 408-766-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS SOUTH CA
2010-04-14 408-462-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SUNNYVALE CA
2010-02-23 408-380-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2010-02-23 408-380-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2010-02-23 408-579-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2010-02-23 408-579-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2010-02-22 408-637-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CAMPBELL CA
2010-02-22 408-641-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2009-11-17 408-372-9XXX 9000–9999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS NORTH CA
2009-10-26 408-217-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2009-09-18 408-855-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2009-08-14 408-899-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2009-03-26 408-701-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SUNNYVALE CA
2008-10-24 408-770-1XXX 1000–1999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS NORTH CA
2008-10-17 408-256-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS SOUTH CA
2008-10-17 408-886-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2008-10-17 408-940-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SUNNYVALE CA
2008-09-17 408-324-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS NORTH CA
2008-09-17 408-550-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2008-02-08 408-468-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS NORTH CA
2008-02-08 408-493-1XXX 1000–1999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS NORTH CA
2007-11-28 408-429-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CAMPBELL CA
2007-11-28 408-429-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CAMPBELL CA
2007-11-28 408-461-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SAN MARTIN CA
2007-11-28 408-665-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J GILROY CA
2007-08-14 408-503-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS NORTH CA
2007-08-08 408-598-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SUNNYVALE CA
2007-02-27 408-500-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MORGANHILL CA
2007-02-27 408-500-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MORGANHILL CA
2007-02-14 408-343-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS WEST CA
2007-02-14 408-402-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LOS GATOS CA
2007-02-14 408-402-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LOS GATOS CA
2007-02-14 408-419-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SUNNYVALE CA
2007-02-14 408-419-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SUNNYVALE CA
2007-02-14 408-440-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNJS SOUTH CA

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.