Local Calling Guide

Area code/prefix search

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Switch: CHCGILGMDS7

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
773-272 7 Chicago Zone 03-Newcastle IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2000-06-20   
773-273 6 Chicago Zone 02-Rogers Park IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-10-25   
773-273 7 Chicago Zone 02-Rogers Park IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-04-10   
773-273 8 Chicago Zone 02-Rogers Park IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2009-12-07   
773-279 5 Chicago Zone 02-Irving IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-10-25   
773-289 0 Chicago Zone 04-Humboldt IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-07-31   
773-290 A Chicago Zone 02-Edgewater IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-290 2 Chicago Zone 02-Edgewater IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-01-01   
773-290 5 Chicago Zone 02-Edgewater IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-290 6 Chicago Zone 02-Edgewater IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2000-01-26   
773-290 8 Chicago Zone 02-Edgewater IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-01-15   
773-295 0 Chicago Zone 05-Merrimac IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-10-26   
773-295 1 Chicago Zone 05-Merrimac IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-04-28   
773-295 2 Chicago Zone 05-Merrimac IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-03-24   
773-295 4 Chicago Zone 05-Merrimac IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2003-08-18   
773-295 6 Chicago Zone 05-Merrimac IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-03-24   
773-295 7 Chicago Zone 05-Merrimac IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-04-28   
773-295 8 Chicago Zone 05-Merrimac IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2000-10-16   
773-303 6 Chicago Zone 02-Edgewater IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-10-25   
773-309 4 Chicago Zone 05-Austin IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2004-11-22   
773-313 3 Chicago Zone 02-Edgewater IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-10-25   
773-321 A Chicago Zone 06-Kedzie IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-321 0 Chicago Zone 06-Kedzie IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2008-07-18   
773-321 6 Chicago Zone 06-Kedzie IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2000-01-26   
773-321 7 Chicago Zone 06-Kedzie IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2000-01-26   
773-321 8 Chicago Zone 06-Kedzie IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2010-02-15   
773-326 A Chicago Zone 07-Stewart IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-326 0 Chicago Zone 07-Stewart IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-326 1 Chicago Zone 07-Stewart IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-326 2 Chicago Zone 07-Stewart IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-326 3 Chicago Zone 07-Stewart IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-326 4 Chicago Zone 07-Stewart IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-326 6 Chicago Zone 07-Stewart IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-328 8 Chicago Zone 04-Humboldt IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2010-11-27   
773-336 7 Chicago Zone 09-South Chicago IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   1999-12-03   
773-336 8 Chicago Zone 09-South Chicago IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2000-04-25   
773-340 4 Chicago Zone 08-Portsmouth IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2008-07-18   
773-349 4 Chicago Zone 08-Portsmouth IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2001-11-13   
773-353 A Chicago Zone 03-Kildare IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-353 0 Chicago Zone 03-Kildare IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-353 1 Chicago Zone 03-Kildare IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-353 2 Chicago Zone 03-Kildare IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-353 3 Chicago Zone 03-Kildare IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-353 4 Chicago Zone 03-Kildare IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-353 5 Chicago Zone 03-Kildare IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-353 6 Chicago Zone 03-Kildare IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-353 7 Chicago Zone 03-Kildare IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-353 8 Chicago Zone 03-Kildare IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-355 2 Chicago Zone 03-Kildare IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2000-07-05   
773-355 3 Chicago Zone 03-Kildare IL 6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2000-07-05   

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Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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