Local Calling Guide

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NPA: 312 [Rate centres in NPA 312] [Dial plan for NPA 312]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-255 0 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-255 1 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-255 2 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-255 3 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-255 4 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-255 5 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-255 6 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-255 7 Chicago Zone 01-Superior IL   516C AT&T CORP. 358      
312-255 8 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-255 9 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-256 A Chicago Zone 01-Canal IL CHCHILLEDS0  8950 ALLEGIANCE TELECOM, INC. - IL 358      
312-256 0 Chicago Zone 01-Canal IL   8950 ALLEGIANCE TELECOM, INC. - IL 358      
312-256 1 Chicago Zone 01-Canal IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2010-08-16   
312-256 2 Chicago Zone 01-Canal IL   8950 ALLEGIANCE TELECOM, INC. - IL 358      
312-256 3 Chicago Zone 01-Canal IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2010-08-16   
312-256 4 Chicago Zone 01-Canal IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2010-03-01   
312-256 5 Chicago Zone 01-Canal IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2010-03-01   
312-256 6 Chicago Zone 01-Canal IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2010-03-01   
312-256 7 Chicago Zone 01-Canal IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2010-03-01   
312-256 8 Chicago Zone 01-Canal IL   5917 FIRST COMMUNICATIONS, LLC 358   2009-01-31   
312-256 9 Chicago Zone 01-Canal IL   8950 ALLEGIANCE TELECOM, INC. - IL 358      
312-257 A Chicago Zone 01-Calumet IL ELGNIL32CM2  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2011-10-16   
312-257 0 Chicago Zone 01-Calumet IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2011-10-16   
312-257 1 Chicago Zone 01-Calumet IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2012-06-17   
312-257 2 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2011-10-18   
312-257 3 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2011-10-18   
312-257 4 Chicago Zone 01-Calumet IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2012-06-24   
312-257 5 Chicago Zone 01-Calumet IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2012-06-24   
312-257 6 Chicago Zone 01-Calumet IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2012-07-01   
312-257 7 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2012-06-24   
312-257 8 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2012-06-24   
312-257 9 Chicago Zone 01-Calumet IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2012-07-01   
312-258 A Chicago Zone 01-Canal IL CHCGILCLDS0  9329 AMERITECH ILLINOIS 358      
312-259 A Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-260 A Chicago Zone 01-Monroe IL BNSVILDGDS0  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   7056 XO ILLINOIS, INC. 358   2005-12-12   
312-260 8 Chicago Zone 01-Monroe IL   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 9 Chicago Zone 01-Monroe IL   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-261 A Chicago Zone 01-Franklin IL CHCGILABDS0  7721 BROADWING COMMUNICATIONS, LLC - IL 358      
312-261 0 Chicago Zone 01-Franklin IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2010-10-02   
312-261 1 Chicago Zone 01-Franklin IL   7721 BROADWING COMMUNICATIONS, LLC - IL 358      
312-261 2 Chicago Zone 01-Franklin IL   7721 BROADWING COMMUNICATIONS, LLC - IL 358      
312-261 3 Chicago Zone 01-Franklin IL   7721 BROADWING COMMUNICATIONS, LLC - IL 358      

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Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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