Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Chicago Zone 01-Calumet, IL

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
312-486 0   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 1   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 2   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 3   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 4   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 5   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 6   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 7   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 8   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 9   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-487 A ELGNILOTGT5  5562 METROPCS, INC. 358      
312-487 0   5562 METROPCS, INC. 358   2014-12-18   
312-487 1   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-12-19   
312-487 2   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-12-19   
312-487 3   224C ONVOY, LLC 358   2014-12-30   
312-487 4   224C ONVOY, LLC 358   2014-12-30   
312-487 5   460K FIRST COMMUNICATIONS, LLC 358   2014-12-19   
312-487 6   5562 METROPCS, INC. 358   2014-12-18   
312-487 7   5562 METROPCS, INC. 358   2014-12-18   
312-487 8   5562 METROPCS, INC. 358   2014-12-18   
312-487 9   5562 METROPCS, INC. 358   2014-12-18   
312-488 A CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-488 0   224C ONVOY, LLC 358   2019-02-18   
312-488 1   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-10-25   
312-488 2   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2009-10-31   
312-488 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2009-10-31   
312-488 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2009-10-31   
312-488 5   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2010-02-14   
312-488 6   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2010-02-14   
312-488 7   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2010-02-14   
312-488 8   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2010-02-14   
312-488 9   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-498 A ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-498 0   6529 T-MOBILE USA, INC. 358      
312-498 1   6529 T-MOBILE USA, INC. 358      
312-498 2   6529 T-MOBILE USA, INC. 358      
312-498 3   6529 T-MOBILE USA, INC. 358      
312-498 4   6529 T-MOBILE USA, INC. 358      
312-498 5   6529 T-MOBILE USA, INC. 358      
312-498 6   6529 T-MOBILE USA, INC. 358      
312-498 7   6529 T-MOBILE USA, INC. 358      
312-498 8   6529 T-MOBILE USA, INC. 358      
312-498 9   6529 T-MOBILE USA, INC. 358      
312-500 A CHCGIL24DS6  224C ONVOY, LLC 358      
312-500 0   224C ONVOY, LLC 358   2018-07-21   
312-500 1   224C ONVOY, LLC 358   2018-07-21   
312-500 2   224C ONVOY, LLC 358   2018-07-21   
312-500 3   224C ONVOY, LLC 358   2018-07-21   
312-500 4   224C ONVOY, LLC 358   2018-07-21   
312-500 5   224C ONVOY, LLC 358   2018-07-21   

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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