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 630
LEVEL 3 COMMUNICATIONS, LLC - IL 195
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
2018-03-30 630-376-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LOMBARD IL
2016-09-22 630-454-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BATAVIA IL
2014-01-15 630-984-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GLEN ELLYN IL
2013-09-20 630-517-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WHEATON IL
2013-09-10 630-463-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GENEVA IL
2013-09-06 630-473-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 W CHICAGO IL
2013-01-04 630-581-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HINSDALE IL
2012-12-17 630-489-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LOMBARD IL
2012-11-29 630-948-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BENSENVL IL
2012-11-07 630-448-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ELBURN IL
2012-10-16 630-796-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DOWNERSGRV IL
2012-10-11 630-590-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HINSDALE IL
2012-08-03 630-426-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LOMBARD IL
2012-07-05 630-560-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HINSDALE IL
2012-05-30 630-318-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BIG ROCK IL
2012-03-14 630-626-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ITASCA IL
2012-02-29 630-560-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HINSDALE IL
2012-02-09 630-755-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LEMONT IL
2012-02-03 630-796-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DOWNERSGRV IL
2012-01-18 630-984-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GLEN ELLYN IL
2011-12-28 630-449-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 AURORA IL
2011-12-21 630-478-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ELMHURST IL
2011-12-14 630-473-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 W CHICAGO IL
2011-12-14 630-948-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BENSENVL IL
2011-12-08 630-282-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LOMBARD IL
2011-12-08 630-974-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HINSDALE IL
2011-11-17 630-796-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DOWNERSGRV IL
2011-03-10 630-426-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LOMBARD IL
2011-03-10 630-445-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NAPERVILLE IL
2011-03-10 630-449-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 AURORA IL
2011-02-18 630-313-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GENEVA IL
2011-01-20 630-449-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 AURORA IL
2011-01-03 630-480-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WHEATON IL
2010-11-03 630-824-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DOWNERSGRV IL
2010-10-27 630-506-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 AURORA IL
2010-10-27 630-599-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LOMBARD IL
2010-10-27 630-948-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BENSENVL IL
2010-10-08 630-504-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BARTLETT IL
2010-09-01 630-478-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ELMHURST IL
2010-08-13 630-560-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HINSDALE IL
2010-07-26 630-256-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 AURORA IL
2008-11-25 630-504-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BARTLETT IL
2008-11-25 630-590-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HINSDALE IL
2008-11-04 630-599-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LOMBARD IL
2008-07-17 630-914-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LEMONT IL
2008-07-08 630-517-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WHEATON IL
2008-07-08 630-517-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WHEATON IL
2008-06-12 630-487-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DOWNERSGRV IL
2008-05-05 630-352-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NAPERVILLE IL
2008-05-05 630-352-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NAPERVILLE IL

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.