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 302
LEVEL 3 COMMUNICATIONS, LLC - DE 130
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
2025-03-25 302-675-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 MILFORD DE
2022-10-31 302-596-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2022-10-31 302-596-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2022-10-31 302-596-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2022-02-25 302-596-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2021-03-24 302-551-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2020-03-19 302-985-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2019-06-14 302-496-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 NEWARK DE
2015-10-07 302-318-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 NEWARK DE
2015-08-19 302-516-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2015-06-17 302-518-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2014-09-29 302-992-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2014-02-25 302-512-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2014-02-25 302-512-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2014-02-25 302-512-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2014-02-25 302-512-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2014-02-25 302-512-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2014-02-25 302-512-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2014-02-25 302-512-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2014-02-25 302-512-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2014-02-25 302-512-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2014-02-25 302-512-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2013-12-26 302-231-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 ANGOLA DE
2013-07-02 302-304-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2013-04-29 302-266-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 NEWARK DE
2013-04-17 302-504-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2012-09-10 302-401-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 DOVER DE
2011-10-12 302-613-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 NEW CASTLE DE
2011-09-29 302-408-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 HOLLY OAK DE
2011-03-10 302-241-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 DOVER DE
2011-01-07 302-722-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 NEWARK DE
2010-12-17 302-595-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 DELAWARECY DE
2010-12-13 302-300-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2010-12-13 302-300-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2010-07-15 302-416-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2010-07-15 302-416-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2009-12-09 302-416-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2009-12-03 302-468-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2008-08-01 302-358-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2008-05-19 302-564-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 SELBYVILLE DE
2008-05-07 302-763-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 HOCKESSIN DE
2008-05-06 302-449-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 MIDDLETOWN DE
2008-05-06 302-462-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 DELMAR DE
2008-05-06 302-541-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 OCEAN VIEW DE
2008-05-06 302-544-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 NEW CASTLE DE
2008-05-06 302-664-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 MILTON DE
2008-05-06 302-715-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 LAUREL DE
2008-03-13 302-778-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 WILMINGTON DE
2008-02-01 302-525-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 NEWARK DE
2008-01-22 302-444-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - DE 4801 NEWARK DE

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.