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 541
TELEPORT COMMUNICATIONS AMERICA, LLC - OR 44
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
2024-03-14 541-309-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 LAKEVIEW OR
2023-08-22 541-635-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 TOLEDO OR
2019-10-16 541-572-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 MYRTLE PT OR
2019-06-18 541-674-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 CRESWELL OR
2019-06-18 541-675-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 MADRAS OR
2018-12-31 541-818-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 SWEET HOME OR
2018-12-31 541-860-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 MYRTLE CRK OR
2018-08-17 541-413-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 BURNS OR
2018-08-02 541-354-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 ODELL OR
2018-03-01 541-529-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 OAKLAND OR
2017-07-25 541-727-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 CENTRAL PT OR
2017-04-12 541-415-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 CAVE JCT OR
2016-12-06 541-258-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 LEBANON OR
2016-05-31 541-230-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 CORVALLIS OR
2015-07-31 541-952-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 JUNCTIONCY OR
2015-07-14 541-251-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 BROOKINGS OR
2015-07-14 541-901-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 FLORENCE OR
2015-06-15 541-366-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 PORTORFORD OR
2015-05-12 541-709-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 ONTARIO OR
2015-03-16 541-807-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 UNION OR
2015-01-14 541-293-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 NYSSA OR
2014-10-31 541-398-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 ENTERPRISE OR
2013-09-25 541-360-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 CORVALLIS OR
2013-09-25 541-360-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 CORVALLIS OR
2013-09-25 541-360-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 CORVALLIS OR
2013-05-08 541-454-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 ARLINGTON OR
2013-04-17 541-879-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 WHITE CITY OR
2012-12-13 541-239-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 BAKER OR
2012-12-13 541-303-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 HERMISTON OR
2012-12-13 541-304-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 PENDLETON OR
2012-12-13 541-397-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 THE DALLES OR
2012-12-13 541-418-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 LINCOLN CY OR
2012-12-13 541-604-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 REDMOND OR
2012-12-13 541-716-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 HOOD RIVER OR
2012-06-20 541-319-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 REEDSPORT OR
2012-06-20 541-861-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 MILTONFWTR OR
2012-05-22 541-329-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 BANDON OR
2012-05-22 541-435-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 COOS BAY OR
2012-05-22 541-605-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 LA GRANDE OR
2009-05-12 541-649-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 COTTAGEGRV OR
2005-08-02 541-552-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 ASHLAND OR
2003-03-20 541-351-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 NEWPORT OR
2003-03-20 541-363-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 KLAMATHFLS OR
2002-11-15 541-326-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 MEDFORD OR

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.