Local Calling Guide

Area code/prefix search

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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
312-200 A Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-11-23   
312-200 0 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-11-23   
312-200 1 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-11-23   
312-200 2 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-11-23   
312-200 3 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-11-23   
312-200 4 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-11-23   
312-200 5 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-11-23   
312-200 6 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-11-23   
312-200 7 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2018-10-08   
312-200 8 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2018-10-08   
312-200 9 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-11-23   
312-201 A Chicago Zone 01-Franklin IL CHCGILFRDS0  9329 AMERITECH ILLINOIS 358      
312-202 A Chicago Zone 01-Superior IL CHCGILSUDS2  9329 AMERITECH ILLINOIS 358      
312-202 0 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-202 1 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-202 2 Chicago Zone 01-Superior IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2011-01-14   
312-202 3 Chicago Zone 01-Superior IL   5447 ACCESS ONE, INC. - IL 358   2011-12-27   
312-202 4 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-202 5 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-202 6 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-202 7 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-202 8 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-202 9 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-203 A Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-204 A Chicago Zone 01-Superior IL CHCGILSUDS2  9329 AMERITECH ILLINOIS 358      
312-204 0 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-204 1 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-204 2 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-204 3 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-204 4 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-204 5 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-204 6 Chicago Zone 01-Superior IL   7056 XO ILLINOIS, INC. 358   2008-10-31   
312-204 7 Chicago Zone 01-Superior IL   7056 XO ILLINOIS, INC. 358   2008-10-31   
312-204 8 Chicago Zone 01-Superior IL   7056 XO ILLINOIS, INC. 358   2008-10-31   
312-204 9 Chicago Zone 01-Superior IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2010-09-02   
312-205 A Chicago Zone 01-Illinois Dearborn IL CHCHILLEDS0  8950 ALLEGIANCE TELECOM, INC. - IL 358      
312-206 A Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-207 A Chicago Zone 01-Canal IL CHCGILCLDS3  9329 AMERITECH ILLINOIS 358      
312-207 0 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-207 1 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-207 2 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-207 3 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-207 4 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-207 5 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-207 6 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-207 7 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-207 8 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-207 9 Chicago Zone 01-Canal IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2013-02-08   
312-208 A Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-209 A Northbrook West IL ELGNIL32CM0  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      

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

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