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 504
LEVEL 3 COMMUNICATIONS, LLC - LA 87
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
2022-12-06 504-414-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 JESUITBEND LA
2022-08-24 504-429-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2022-04-20 504-433-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2022-04-14 504-754-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2017-08-24 504-350-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2017-07-10 504-372-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2016-05-04 504-565-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2016-03-29 504-290-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 KENNER LA
2014-07-24 504-702-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2014-07-02 504-229-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 KENNER LA
2014-04-24 504-500-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 JESUITBEND LA
2014-04-24 504-689-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LAFITTE LA
2014-04-16 504-577-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2014-04-16 504-881-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2014-04-10 504-229-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 KENNER LA
2014-02-28 504-784-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2013-10-02 504-636-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2013-10-02 504-708-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2013-07-10 504-636-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2013-06-17 504-826-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2013-04-15 504-814-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 VENICE LA
2013-03-20 504-434-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2013-01-15 504-777-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2013-01-15 504-777-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2012-07-11 504-229-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 KENNER LA
2011-05-05 504-595-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2011-03-25 504-327-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 KENNER LA
2011-02-18 504-300-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2011-02-18 504-613-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2010-12-13 504-264-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2010-12-13 504-264-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2010-12-13 504-264-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2010-11-01 504-327-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 KENNER LA
2010-10-05 504-684-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2010-10-05 504-708-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2010-08-05 504-684-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2010-06-11 504-684-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2010-05-10 504-265-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2008-05-22 504-383-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2008-05-22 504-383-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2008-05-22 504-383-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2008-05-22 504-383-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2008-03-13 504-302-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2008-02-19 504-322-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2007-11-20 504-267-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2007-10-15 504-708-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2007-09-24 504-267-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2007-09-12 504-708-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2007-08-28 504-684-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2007-08-28 504-684-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA

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.