Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
224-948 A Deerfield IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-204 6 Chicago Zone 01-Superior IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2008-10-31   
312-204 7 Chicago Zone 01-Superior IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2008-10-31   
312-204 8 Chicago Zone 01-Superior IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2008-10-31   
312-205 A Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-212 4 Chicago Zone 01-Wabash IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2005-07-30   
312-212 5 Chicago Zone 01-Wabash IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2005-07-30   
312-212 7 Chicago Zone 01-Wabash IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2005-07-30   
312-239 7 Chicago Zone 01-Canal IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2005-12-12   
312-244 3 Chicago Zone 01-Franklin IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2005-12-12   
312-244 4 Chicago Zone 01-Franklin IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2005-12-12   
312-252 A Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-252 0 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-252 1 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-252 2 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-252 3 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-252 4 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-252 5 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-252 8 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-252 9 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-253 A Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-253 0 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-253 1 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-253 2 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-253 4 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-253 7 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-253 8 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-253 9 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-254 A Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-254 0 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-254 1 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-254 2 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-254 3 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-254 4 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-254 5 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-254 8 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2008-10-14   
312-254 9 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-256 A Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-256 0 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-256 2 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-256 9 Chicago Zone 01-Calumet IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 A Chicago Zone 01-Monroe IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 0 Chicago Zone 01-Monroe IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 1 Chicago Zone 01-Monroe IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 2 Chicago Zone 01-Monroe IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 3 Chicago Zone 01-Monroe IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 4 Chicago Zone 01-Monroe IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 5 Chicago Zone 01-Monroe IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 6 Chicago Zone 01-Monroe IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 7 Chicago Zone 01-Monroe IL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2005-12-12   

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Last updated: Sat, 02 May 2026 12:20:53 UTC

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