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
312-929 2   318J COMCAST IP PHONE, LLC 358   2006-12-18   
312-929 3   318J COMCAST IP PHONE, LLC 358   2006-12-18   
312-929 4   318J COMCAST IP PHONE, LLC 358   2006-12-18   
312-929 5   6529 T-MOBILE USA, INC. 358   2008-11-01   
312-929 6   6529 T-MOBILE USA, INC. 358   2007-07-27   
312-929 7   6529 T-MOBILE USA, INC. 358   2008-02-08   
312-929 8   6529 T-MOBILE USA, INC. 358   2008-02-25   
312-929 9   6529 T-MOBILE USA, INC. 358   2007-07-27   
312-933 A ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-933 0   6529 T-MOBILE USA, INC. 358      
312-933 1   6529 T-MOBILE USA, INC. 358      
312-933 2   6529 T-MOBILE USA, INC. 358      
312-933 3   6529 T-MOBILE USA, INC. 358      
312-933 4   6529 T-MOBILE USA, INC. 358      
312-933 5   6529 T-MOBILE USA, INC. 358      
312-933 6   6529 T-MOBILE USA, INC. 358      
312-933 7   6529 T-MOBILE USA, INC. 358      
312-933 8   6529 T-MOBILE USA, INC. 358      
312-933 9   6529 T-MOBILE USA, INC. 358      
312-934 A ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-934 0   224C ONVOY, LLC 358   2015-12-18   
312-934 1   5562 METROPCS, INC. 358   2015-12-05   
312-934 2   508J CENTURYLINK COMMUNICATIONS, LLC 358   2015-03-09   
312-934 3   6529 T-MOBILE USA, INC. 358   2015-02-05   
312-934 4   6529 T-MOBILE USA, INC. 358   2015-02-05   
312-934 5   6529 T-MOBILE USA, INC. 358   2015-02-05   
312-934 6   6529 T-MOBILE USA, INC. 358   2015-02-05   
312-934 7   6529 T-MOBILE USA, INC. 358   2015-02-05   
312-934 8   6529 T-MOBILE USA, INC. 358   2015-02-05   
312-934 9   6529 T-MOBILE USA, INC. 358   2015-02-05   
312-937 A RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-937 0   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2014-11-09   
312-937 1   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2014-11-09   
312-937 2   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2014-11-09   
312-937 3   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2014-11-09   
312-937 4   6529 T-MOBILE USA, INC. 358   2015-07-22   
312-937 5   6529 T-MOBILE USA, INC. 358   2015-07-22   
312-937 6   5562 METROPCS, INC. 358   2015-07-22   
312-937 7   5562 METROPCS, INC. 358   2015-07-22   
312-937 8   5562 METROPCS, INC. 358   2015-07-22   
312-937 9   5562 METROPCS, INC. 358   2014-11-15   
312-940 A CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358      
312-940 0   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-11-11   
312-940 1   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-11-11   
312-940 2   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-11-11   
312-940 3   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-11-11   
312-940 4   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-11-11   
312-940 5   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-11-11   
312-940 6   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-11-11   
312-940 7   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-11-11   

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

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