Local Calling Guide

Area code/prefix search

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Chicago Zone 01-Monroe, IL

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
312-226 A CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-243 A CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-260 A BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 0 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 1 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 2 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 3 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 4 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 5 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 6 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 7 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2005-12-12   
312-260 8 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-260 9 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-279 A BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-355 A CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-361 A CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-361 0 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-12-09   
312-361 1 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2010-07-14   
312-361 2 CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-361 3 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2010-07-14   
312-361 4 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2011-06-23   
312-361 5 CHCGILTCDS4  7056 XO ILLINOIS, INC. 358   2010-10-27   
312-361 6 CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-361 7 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2011-06-23   
312-361 8 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-12-09   
312-361 9 CHCGILTCDS4  7056 XO ILLINOIS, INC. 358   2010-10-27   
312-363 A CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
312-363 0 CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
312-363 1 CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
312-363 2 CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
312-363 3 CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
312-363 4 CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
312-363 5 CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
312-363 6 CHCGIL24DS3  4604 FIRST COMMUNICATIONS, LLC - IL 358   2004-06-06   
312-363 7 CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2004-07-15   
312-363 8 CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2004-07-15   
312-363 9 CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2004-07-15   
312-413 A CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-421 A CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-432 A CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-433 A CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-433 0 CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-433 1 CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-433 2 CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-433 3 CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-433 4 CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-433 5 CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-433 6 CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-433 7 CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-433 8 CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      

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

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