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 601
LEVEL 3 COMMUNICATIONS, LLC - MS 97
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
2026-04-22 601-375-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 SOSO MS
2022-05-09 601-891-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 FLORENCE MS
2021-03-10 601-860-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 PRENTISS MS
2020-12-29 601-349-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 ELLISVILLE MS
2016-10-03 601-499-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MADISON MS
2016-03-29 601-462-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MERIDIAN MS
2014-07-02 601-974-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 JACKSON MS
2014-04-03 601-539-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 LYNVILLE MS
2014-03-07 601-640-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 SEMINARY MS
2013-05-28 601-620-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 HATTIESBG MS
2011-10-20 601-215-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 PICAYUNE MS
2011-09-09 601-633-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 COLUMBIA MS
2011-06-24 601-643-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 WESSON MS
2011-03-31 601-863-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 JACKSON MS
2011-02-28 601-574-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 HAZLEHURST MS
2011-01-13 601-643-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 WESSON MS
2010-12-14 601-292-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 JACKSON MS
2010-12-14 601-368-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 JACKSON MS
2010-05-24 601-714-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 JACKSON MS
2009-12-31 601-292-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 JACKSON MS
2008-11-13 601-707-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MADISON MS
2008-09-09 601-407-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 CANTON MS
2008-07-17 601-281-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 CRYSTALSPG MS
2008-06-26 601-755-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 WAYNESBORO MS
2008-06-25 601-557-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 QUITMAN MS
2008-05-09 601-990-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 BROOKHAVEN MS
2008-04-16 601-781-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 PHILA MS
2008-03-24 601-253-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 CARTHAGE MS
2008-02-01 601-206-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 JACKSON MS
2008-01-21 601-714-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 JACKSON MS
2008-01-21 601-714-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 JACKSON MS
2007-06-25 601-990-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 BROOKHAVEN MS
2007-06-22 601-427-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MADISON MS
2007-06-22 601-760-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 JACKSON MS
2007-05-09 601-500-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 JACKSON MS
2006-11-29 601-707-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MADISON MS
2006-11-29 601-707-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MADISON MS
2006-11-08 601-608-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 JACKSON MS
2006-10-12 601-600-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MCCOMB MS
2006-10-11 601-500-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 JACKSON MS
2006-09-19 601-600-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MCCOMB MS
2006-09-19 601-600-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MCCOMB MS
2006-09-14 601-872-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 POPLARVL MS
2006-09-14 601-912-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 RICHTON MS
2006-09-06 601-530-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 LUCEDALE MS
2006-08-09 601-781-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 PHILA MS
2006-07-24 601-336-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 HATTIESBG MS
2006-07-24 601-336-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 HATTIESBG MS
2006-07-19 601-633-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 COLUMBIA MS
2006-07-19 601-990-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MS 5178 BROOKHAVEN MS

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.