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 708
LEVEL 3 COMMUNICATIONS, LLC - IL 158
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
2020-08-20 708-855-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICAGOHTS IL
2020-08-20 708-855-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICAGOHTS IL
2019-07-19 708-852-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICAGOHTS IL
2015-07-15 708-831-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN03 IL
2014-04-09 708-315-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LA GRANGE IL
2014-01-23 708-315-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LA GRANGE IL
2012-11-15 708-607-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PEOTONE IL
2012-10-31 708-315-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LA GRANGE IL
2012-10-24 708-314-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICAGOHTS IL
2012-08-03 708-688-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BROOKFIELD IL
2012-06-13 708-887-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN03 IL
2012-04-03 708-501-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HARVEY IL
2012-01-27 708-340-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LA GRANGE IL
2012-01-04 708-688-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BROOKFIELD IL
2010-11-03 708-572-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 OAK LAWN IL
2010-10-27 708-669-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN03 IL
2010-10-06 708-328-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LA GRANGE IL
2010-08-27 708-329-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CICERO IL
2010-08-23 708-298-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CICERO IL
2010-07-22 708-273-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MAYWOOD IL
2010-04-23 708-965-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICAGOHTS IL
2010-01-18 708-733-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICAGOHTS IL
2008-11-17 708-390-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MOKENA IL
2008-11-17 708-872-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LANSING IL
2008-11-04 708-949-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ORLAND IL
2008-08-01 708-221-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 RIVERSIDE IL
2008-07-15 708-248-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICAGOHTS IL
2008-05-05 708-949-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ORLAND IL
2008-05-01 708-234-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BELLWOOD IL
2008-05-01 708-577-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BLUEISLAND IL
2007-05-25 708-669-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN03 IL
2006-09-01 708-414-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CRETE IL
2006-08-31 708-885-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MONEE IL
2006-07-19 708-390-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MOKENA IL
2006-07-10 708-390-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MOKENA IL
2006-06-19 708-689-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FOREST IL
2006-05-08 708-335-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HARVEY IL
2006-05-08 708-381-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 OAK FOR SO IL
2006-05-08 708-587-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MONEE IL
2006-05-08 708-590-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ORLAND IL
2006-03-15 708-258-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PEOTONE IL
2006-03-15 708-375-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BELLWOOD IL
2006-03-13 708-443-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 RIVERSIDE IL
2006-03-07 708-271-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HARVEY IL
2005-12-28 708-433-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BEECHER IL
2005-12-22 708-437-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 RIVERGROVE IL
2005-12-07 708-277-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SUMMIT IL
2005-12-07 708-325-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SUMMIT IL
2005-12-07 708-746-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MONEE IL
2005-11-23 708-223-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MAYWOOD IL

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.