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 847
LEVEL 3 COMMUNICATIONS, LLC - IL 313
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
2017-09-12 847-654-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PALATINE IL
2015-12-09 847-610-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2014-03-27 847-380-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2013-12-11 847-268-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PARK RIDGE IL
2013-10-22 847-973-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FOX LAKE IL
2013-10-17 847-807-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2013-01-09 847-607-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DEERFIELD IL
2012-12-21 847-457-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LAKEFOREST IL
2012-11-07 847-396-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DUNDEE IL
2012-05-31 847-807-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2012-02-09 847-737-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FRANKLINPK IL
2012-02-09 847-979-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ELK GROVE IL
2012-01-27 847-278-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2011-12-08 847-440-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EVANSTON IL
2011-12-01 847-943-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DEERFIELD IL
2011-10-20 847-786-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GLENCOE IL
2011-10-20 847-906-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WILMETTE IL
2011-09-29 847-278-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2011-07-13 847-906-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WILMETTE IL
2011-05-04 847-380-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2011-03-15 847-737-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FRANKLINPK IL
2010-10-27 847-278-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2010-10-08 847-868-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EVANSTON IL
2010-10-08 847-979-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ELK GROVE IL
2008-11-25 847-563-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EVANSTON IL
2008-11-17 847-807-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2008-11-07 847-906-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WILMETTE IL
2008-11-04 847-410-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SKOKIE IL
2008-11-04 847-908-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2008-07-15 847-505-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WAUKEGAN IL
2008-06-03 847-505-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WAUKEGAN IL
2008-05-28 847-752-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GRAYSLAKE IL
2008-05-05 847-235-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LAKEFOREST IL
2008-05-01 847-563-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EVANSTON IL
2008-05-01 847-563-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EVANSTON IL
2008-04-30 847-597-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DEERFIELD IL
2008-02-29 847-278-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2008-01-31 847-527-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DEERFIELD IL
2007-05-30 847-908-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2007-04-13 847-637-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ARLIGTNHTS IL
2007-04-09 847-779-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SKOKIE IL
2006-10-23 847-562-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NORTHBROOK IL
2006-08-21 847-457-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LAKEFOREST IL
2006-08-21 847-660-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ARLIGTNHTS IL
2006-08-17 847-725-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ELK GROVE IL
2006-08-07 847-380-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSELLE IL
2006-07-21 847-665-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GRAYSLAKE IL
2006-07-10 847-794-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PALATINE IL
2006-07-10 847-861-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HIGHLANDPK IL
2006-06-01 847-960-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ALGONQUIN 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.