Local Calling Guide

Area code/prefix search

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Chicago Zone 05-Austin, IL

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
773-345 4 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-345 5 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-345 6 CHCGIL24DS6  224C ONVOY, LLC 358   2017-06-26   
773-345 7 CHCGIL24DS6  224C ONVOY, LLC 358   2017-12-09   
773-345 8 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-345 9 CHCGIL24DS6  224C ONVOY, LLC 358   2019-07-07   
773-378 A CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 0 CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 1 CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 2 CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 3 CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 4 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2024-10-07   
773-378 5 CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 6 CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 7 BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2019-10-22   
773-378 8 CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 9 CHCGIL24DS6  224C ONVOY, LLC 358   2019-07-07   
773-379 A CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-379 0 CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-379 1 CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-379 2 CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-379 3 CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-379 4 CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-379 5 BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2019-10-22   
773-379 6 CHCGIL24XMD  495J STRATUS NETWORKS 358   2020-09-20   
773-379 7 CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-379 8 BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2019-10-22   
773-379 9 CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2024-10-14   
773-413 A OKBRILOAXEX  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
773-413 0 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2008-12-12   
773-413 1 CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2004-08-06   
773-413 2 CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2022-01-07   
773-413 3 CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2005-08-19   
773-413 4 CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2022-01-07   
773-413 5 OKBRILOAXEX  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
773-413 6 CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2003-02-21   
773-413 7 CHCGILCLXOX  516C AT&T CORP. 358   2006-05-02   
773-413 8 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-02-25   
773-413 9 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2008-12-12   
773-417 A CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358      
773-417 0 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-07-02   
773-417 1 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-07-02   
773-417 2 CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358      
773-417 3 CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2006-08-24   
773-417 4 CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2006-09-09   
773-417 5 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-07-02   
773-417 6 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-06-13   
773-417 7 CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2008-11-26   
773-417 8 CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2008-11-26   
773-417 9 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-06-13   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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