Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: CHCGILWUX6X

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
312-676 3 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-676 4 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-676 5 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-676 6 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-676 7 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-676 8 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-676 9 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-690 2 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2014-08-28   
312-690 8 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2015-03-07   
312-768 7 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2005-02-20   
312-784 A Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358      
312-784 0 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2007-09-02   
312-784 1 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2007-09-02   
312-784 2 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2007-09-02   
312-784 3 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2007-09-02   
312-784 4 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2007-09-02   
312-784 5 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2007-09-02   
312-784 6 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2007-09-02   
312-784 7 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2007-09-02   
312-784 8 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2007-09-02   
312-784 9 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2007-09-02   
312-788 1 Chicago Zone 01-Wabash IL 460K FIRST COMMUNICATIONS, LLC 358   2011-06-20   
312-788 2 Chicago Zone 01-Wabash IL 460K FIRST COMMUNICATIONS, LLC 358   2014-04-16   
312-801 8 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2013-09-21   
312-824 6 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2016-08-05   
312-837 2 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2016-06-17   
312-870 A Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358      
312-870 1 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358      
312-870 2 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358      
312-870 3 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358      
312-870 4 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358      
312-870 5 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358      
312-870 6 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358      
312-870 7 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358      
312-870 9 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358      
312-880 1 Chicago Zone 01-Wabash IL 460K FIRST COMMUNICATIONS, LLC 358   2011-06-20   
312-884 3 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2000-03-23   
312-884 4 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2000-03-23   
312-897 1 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2015-05-25   
312-912 6 Chicago Zone 01-Canal IL 460K FIRST COMMUNICATIONS, LLC 358   2010-10-15   
312-964 9 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2015-09-11   
312-989 1 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2016-04-06   
312-994 6 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2001-06-15   
312-994 7 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2000-08-04   
312-995 1 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2014-10-14   
312-999 9 Chicago Zone 01-Calumet IL 460K FIRST COMMUNICATIONS, LLC 358   2014-01-02   
331-219 7 Aurora IL 460K FIRST COMMUNICATIONS, LLC 358   2017-09-25   
331-318 5 Lemont IL 460K FIRST COMMUNICATIONS, LLC 358   2014-03-22   
331-456 A Roselle IL 460K FIRST COMMUNICATIONS, LLC 358      
331-456 0 Roselle IL 460K FIRST COMMUNICATIONS, LLC 358   2008-01-26   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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