Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Chicago Zone 01-Lakeshore, IL

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
312-228 A CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-233 A CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-233 0 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-233 1 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-233 2 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-12-08   
312-233 3 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-233 4 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-233 5 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-233 6 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-233 7 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-233 8 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-233 9 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-240 A CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-297 A CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-374 A CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-374 0 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-374 1 CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2012-12-31   
312-374 2 CHCGIL24DS3  4604 FIRST COMMUNICATIONS, LLC - IL 358   2013-01-04   
312-374 3 CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2012-12-31   
312-374 4 CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2014-01-11   
312-374 5 CHCGILDTDS3  5447 ACCESS ONE, INC. - IL 358   2014-01-12   
312-374 6 CHCGIL24DS6  224C ONVOY, LLC 358   2013-12-23   
312-374 7 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-374 8 CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2015-01-08   
312-374 9 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-472 A CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-472 0 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358   2005-12-18   
312-472 1 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358   2005-12-18   
312-472 2 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358   2005-12-18   
312-472 3 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358   2005-12-18   
312-472 4 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358   2005-12-18   
312-472 5 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358   2005-12-18   
312-472 6 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358   2005-12-18   
312-472 7 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358   2005-12-18   
312-472 8 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358   2005-12-18   
312-472 9 CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358   2005-12-18   
312-521 A CHCGILCLEMD  7421 AT&T - LOCAL 358      
312-521 0 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-521 1 CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2002-11-16   
312-521 2 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2002-11-20   
312-521 3 CHCGILMF4MD  5562 METROPCS, INC. 358   2004-03-01   
312-521 4 CHCGILWUX1X  4717 PAETEC COMMUNICATIONS, INC. - IL 358   2009-04-08   
312-521 5 CHCGILDTDS3  5447 ACCESS ONE, INC. - IL 358   2009-02-25   
312-521 6 CHCGILCLEMD  7421 AT&T - LOCAL 358      
312-521 7 CHCGIL24DS3  4604 FIRST COMMUNICATIONS, LLC - IL 358   2003-10-22   
312-521 8 CHCGILWUX1X  7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358   2013-08-23   
312-521 9 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2011-02-07   
312-540 A CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-552 A CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-565 A CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      

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Last updated: Fri, 22 Mar 2024 03:02:44 UTC

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