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
773-577 8 Chicago Zone 03-Kildare IL 460K FIRST COMMUNICATIONS, LLC 358   2004-04-05   
773-584 4 Chicago Zone 06-Kedzie IL 460K FIRST COMMUNICATIONS, LLC 358   2004-11-12   
773-584 6 Chicago Zone 06-Kedzie IL 460K FIRST COMMUNICATIONS, LLC 358   2003-07-31   
773-597 A Chicago Zone 07-Stewart IL 460K FIRST COMMUNICATIONS, LLC 358      
773-597 1 Chicago Zone 07-Stewart IL 460K FIRST COMMUNICATIONS, LLC 358   2005-03-14   
773-598 3 Chicago Zone 04-Humboldt IL 460K FIRST COMMUNICATIONS, LLC 358   2007-03-10   
773-605 A Chicago Zone 02-Edgewater IL 460K FIRST COMMUNICATIONS, LLC 358      
773-605 0 Chicago Zone 02-Edgewater IL 460K FIRST COMMUNICATIONS, LLC 358   2006-05-27   
773-605 1 Chicago Zone 02-Edgewater IL 460K FIRST COMMUNICATIONS, LLC 358   2006-05-27   
773-605 2 Chicago Zone 02-Edgewater IL 460K FIRST COMMUNICATIONS, LLC 358   2006-05-27   
773-605 3 Chicago Zone 02-Edgewater IL 460K FIRST COMMUNICATIONS, LLC 358   2006-05-27   
773-605 4 Chicago Zone 02-Edgewater IL 460K FIRST COMMUNICATIONS, LLC 358   2006-05-27   
773-605 5 Chicago Zone 02-Edgewater IL 460K FIRST COMMUNICATIONS, LLC 358   2006-05-27   
773-605 6 Chicago Zone 02-Edgewater IL 460K FIRST COMMUNICATIONS, LLC 358   2006-05-27   
773-605 7 Chicago Zone 02-Edgewater IL 460K FIRST COMMUNICATIONS, LLC 358   2006-05-27   
773-605 8 Chicago Zone 02-Edgewater IL 460K FIRST COMMUNICATIONS, LLC 358   2006-05-27   
773-605 9 Chicago Zone 02-Edgewater IL 460K FIRST COMMUNICATIONS, LLC 358   2006-05-27   
773-632 4 Chicago Zone 03-Newcastle IL 460K FIRST COMMUNICATIONS, LLC 358   2004-03-10   
773-632 5 Chicago Zone 03-Newcastle IL 460K FIRST COMMUNICATIONS, LLC 358   2004-03-10   
773-635 1 Chicago Zone 06-Kedzie IL 460K FIRST COMMUNICATIONS, LLC 358   2014-09-15   
773-645 6 Chicago Zone 04-Humboldt IL 460K FIRST COMMUNICATIONS, LLC 358   2005-12-16   
773-658 8 Chicago Zone 05-Austin IL 460K FIRST COMMUNICATIONS, LLC 358   2011-07-24   
773-672 5 Chicago Zone 10-Beverly IL 460K FIRST COMMUNICATIONS, LLC 358   2008-06-15   
773-672 6 Chicago Zone 10-Beverly IL 460K FIRST COMMUNICATIONS, LLC 358   2008-06-14   
773-681 8 Chicago Zone 02-Irving IL 460K FIRST COMMUNICATIONS, LLC 358   2000-08-04   
773-690 4 Chicago Zone 07-Stewart IL 460K FIRST COMMUNICATIONS, LLC 358   2009-02-14   
773-733 7 Chicago Zone 06-Kedzie IL 460K FIRST COMMUNICATIONS, LLC 358   2004-09-09   
773-741 2 Chicago Zone 11-O'Hare IL 460K FIRST COMMUNICATIONS, LLC 358   2004-07-16   
773-751 7 Chicago Zone 02-Edgewater IL 460K FIRST COMMUNICATIONS, LLC 358   2004-11-12   
773-782 9 Chicago Zone 04-Humboldt IL 460K FIRST COMMUNICATIONS, LLC 358   2015-10-29   
773-808 5 Chicago Zone 07-Stewart IL 460K FIRST COMMUNICATIONS, LLC 358   2006-08-19   
773-830 5 Chicago Zone 05-Austin IL 460K FIRST COMMUNICATIONS, LLC 358   2004-09-06   
773-855 7 Chicago Zone 07-Oakland IL 460K FIRST COMMUNICATIONS, LLC 358   2006-07-03   
773-888 8 Chicago Zone 04-Humboldt IL 460K FIRST COMMUNICATIONS, LLC 358   2013-12-19   
773-904 4 Chicago Zone 04-Humboldt IL 460K FIRST COMMUNICATIONS, LLC 358   2008-09-12   
773-904 5 Chicago Zone 04-Humboldt IL 460K FIRST COMMUNICATIONS, LLC 358   2008-08-17   
773-987 A Chicago Zone 10-Beverly IL 460K FIRST COMMUNICATIONS, LLC 358      
773-987 3 Chicago Zone 10-Beverly IL 460K FIRST COMMUNICATIONS, LLC 358   2005-05-20   
779-234 3 Plainfield IL 460K FIRST COMMUNICATIONS, LLC 358   2015-02-16   
815-207 6 Joliet IL 460K FIRST COMMUNICATIONS, LLC 358   2005-02-10   
815-214 5 Kankakee IL 460K FIRST COMMUNICATIONS, LLC 358   2005-02-20   
815-215 A New Lenox IL 460K FIRST COMMUNICATIONS, LLC 358      
815-215 0 New Lenox IL 460K FIRST COMMUNICATIONS, LLC 358      
815-215 4 New Lenox IL 460K FIRST COMMUNICATIONS, LLC 358   2005-02-26   
815-215 5 New Lenox IL 460K FIRST COMMUNICATIONS, LLC 358   2003-11-12   
815-221 6 Lockport IL 460K FIRST COMMUNICATIONS, LLC 358   2005-03-19   
815-237 6 Gardner IL 460K FIRST COMMUNICATIONS, LLC 358   2005-02-20   
815-261 3 Crystal Lake IL 460K FIRST COMMUNICATIONS, LLC 358   2003-08-12   
815-267 5 Plainfield IL 460K FIRST COMMUNICATIONS, LLC 358   2005-02-20   
815-269 1 Danforth IL 460K FIRST COMMUNICATIONS, LLC 358   2005-02-26   

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

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