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: 589

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-589 A Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-589 0 Chicago Zone 01-Canal IL CHCGILMF2MD  6664 SPRINT SPECTRUM, L.P. 358   2011-01-05   
312-589 1 Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-589 2 Chicago Zone 01-Canal IL CHCGILWUDS0  7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358   2008-06-02   
312-589 3 Chicago Zone 01-Canal IL CHCGILWUDS0  7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358   2008-06-02   
312-589 4 Chicago Zone 01-Canal IL CHCGILWUDS0  7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358   2008-10-25   
312-589 5 Chicago Zone 01-Canal IL CHCGIL24DS3  4604 FIRST COMMUNICATIONS LLC - IL 358   2006-03-27   
312-589 6 Chicago Zone 01-Canal IL CHCGILCPDS5  4717 PAETEC COMMUNICATIONS, INC. - IL 358   2007-05-09   
312-589 7 Chicago Zone 01-Canal IL CHCGILTCDS4  7056 XO ILLINOIS, INC. 358   2011-01-05   
312-589 8 Chicago Zone 01-Canal IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2013-02-08   
312-589 9 Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      

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

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