NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 404
LEVEL 3 COMMUNICATIONS, LLC - GA 155
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
2019-11-08 404-383-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2019-07-02 404-301-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2019-07-02 404-301-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2019-05-08 404-301-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2018-01-26 404-534-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2018-01-26 404-534-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2015-10-01 404-609-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2015-10-01 404-609-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2015-10-01 404-609-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2015-05-20 404-476-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2015-05-20 404-476-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2015-05-20 404-476-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2014-05-27 404-341-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2014-05-27 404-341-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2014-05-27 404-341-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2014-05-27 404-341-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2014-05-27 404-471-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2014-05-09 404-205-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-12-17 404-975-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-12-17 404-975-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-07-11 404-998-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-06-26 404-800-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-06-21 404-900-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-06-21 404-900-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-06-21 404-900-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-06-04 404-334-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-06-04 404-334-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-06-04 404-334-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-06-04 404-410-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-05-16 404-620-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-05-16 404-620-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-05-16 404-620-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-04-22 404-620-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-04-22 404-620-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-04-05 404-334-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-02-28 404-334-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2013-02-28 404-334-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2012-12-12 404-445-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2012-12-12 404-445-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2012-11-15 404-490-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2012-02-08 404-662-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2012-02-08 404-662-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2012-02-08 404-662-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2011-10-28 404-263-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2011-10-18 404-719-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2011-10-18 404-719-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2011-09-23 404-996-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2011-09-19 404-236-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2011-09-19 404-586-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2011-07-07 404-994-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA

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.