Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 312 [Rate centres in NPA 312] [Dial plan for NPA 312]

NXX: 568

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-568 A Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-568 0 Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-568 1 Chicago Zone 01-Canal IL CHCGILCPDS5  4717 PAETEC COMMUNICATIONS, INC. - IL 358   2006-11-27   
312-568 2 Chicago Zone 01-Canal IL CHCGIL24DS7  5917 FIRST COMMUNICATIONS, LLC 358   2005-11-17   
312-568 3 Chicago Zone 01-Canal IL CHCGIL24DS7  5917 FIRST COMMUNICATIONS, LLC 358   2005-11-17   
312-568 4 Chicago Zone 01-Canal IL CHCGIL24DS3  4604 FIRST COMMUNICATIONS LLC - IL 358   2006-04-27   
312-568 5 Chicago Zone 01-Canal IL CHCGIL24DS3  4604 FIRST COMMUNICATIONS LLC - IL 358   2005-10-02   
312-568 6 Chicago Zone 01-Canal IL CHCGILMF2MD  6664 SPRINT SPECTRUM, L.P. 358   2011-01-05   
312-568 7 Chicago Zone 01-Canal IL CHCGILCPDS5  4717 PAETEC COMMUNICATIONS, INC. - IL 358   2006-12-13   
312-568 8 Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-568 9 Chicago Zone 01-Canal IL CHCGILMF2MD  6664 SPRINT SPECTRUM, L.P. 358   2011-01-05   

Last updated: Fri, 13 May 2022 22:16:13 UTC

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