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
312-533 6 Chicago Zone 01-Wabash IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-533 7 Chicago Zone 01-Wabash IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-533 8 Chicago Zone 01-Wabash IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-533 9 Chicago Zone 01-Wabash IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-534 A Chicago Zone 01-Calumet IL CHCGILSUDS0  9329 AMERITECH ILLINOIS 358   2008-11-01   
312-534 0 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358   2008-11-01   
312-534 1 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358   2008-11-01   
312-534 2 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358   2008-11-01   
312-534 3 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358   2008-11-01   
312-534 4 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358   2008-11-01   
312-534 5 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358   2008-11-01   
312-534 6 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358   2008-11-01   
312-534 7 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358   2008-11-01   
312-534 8 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358   2008-11-01   
312-534 9 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358   2008-11-01   
312-535 A Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2017-09-22   
312-535 0 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2017-09-22   
312-535 1 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2017-09-22   
312-535 2 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2017-09-22   
312-535 3 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2017-09-22   
312-535 4 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2017-09-22   
312-535 5 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2017-09-23   
312-535 6 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2017-09-23   
312-535 7 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2017-09-23   
312-535 8 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2017-09-23   
312-535 9 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2017-09-23   
312-536 A Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358      
312-536 0 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-10   
312-536 1 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-10   
312-536 2 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-10   
312-536 3 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-10   
312-536 4 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-10   
312-536 5 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-10   
312-536 6 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-10   
312-536 7 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-10   
312-536 8 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-10   
312-536 9 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2015-08-10   
312-537 A Chicago Zone 01-Canal IL CHCGILCLDS3  9329 AMERITECH ILLINOIS 358      
312-537 0 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-537 1 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-537 2 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-537 3 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-537 4 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-537 5 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-537 6 Chicago Zone 01-Canal IL   4717 PAETEC COMMUNICATIONS, INC. - IL 358   2009-04-08   
312-537 7 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-537 8 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-537 9 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-538 A Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-09-04   
312-538 0 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-09-04   

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

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