Local Calling Guide

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Chicago Zone 05-Austin, IL

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
773-242 A CICRILCIDS0  9329 ILLINOIS BELL TEL CO 358      
773-242 0   6529 T-MOBILE USA, INC. 358   2008-08-12   
773-242 1   9329 ILLINOIS BELL TEL CO 358      
773-242 2   5447 ACCESS ONE, INC. - IL 358   2006-01-20   
773-242 3   6529 T-MOBILE USA, INC. 358   2010-07-30   
773-242 4   6529 T-MOBILE USA, INC. 358   2010-07-30   
773-242 5   6529 T-MOBILE USA, INC. 358   2010-07-30   
773-242 6   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2010-11-27   
773-242 7   984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-08-26   
773-242 8   984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-08-26   
773-242 9   984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-06-17   
773-261 A CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-261 0   9329 ILLINOIS BELL TEL CO 358      
773-261 1   9329 ILLINOIS BELL TEL CO 358      
773-261 2   9329 ILLINOIS BELL TEL CO 358      
773-261 3   9329 ILLINOIS BELL TEL CO 358      
773-261 4   9329 ILLINOIS BELL TEL CO 358      
773-261 5   9329 ILLINOIS BELL TEL CO 358      
773-261 6   9329 ILLINOIS BELL TEL CO 358      
773-261 7   9329 ILLINOIS BELL TEL CO 358      
773-261 8   224C ONVOY, LLC 358   2021-12-24   
773-261 9   224C ONVOY, LLC 358   2018-12-27   
773-287 A CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-300 A CHCGIL24DS6  224C ONVOY, LLC 358      
773-300 0   145J TERRA NOVA TELECOM INC. 358   2023-08-19   
773-300 1   224C ONVOY, LLC 358   2023-10-08   
773-300 2   224C ONVOY, LLC 358   2023-08-18   
773-300 3   224C ONVOY, LLC 358   2023-08-18   
773-300 4   224C ONVOY, LLC 358   2023-08-18   
773-300 5   224C ONVOY, LLC 358   2023-10-08   
773-300 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2023-08-19   
773-300 7   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2023-08-19   
773-300 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2023-08-19   
773-300 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2023-08-19   
773-309 A CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2024-12-09   
773-309 0   829J PAETEC ITEL, LLC 358      
773-309 1   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-02-25   
773-309 2   073H TELNYX LLC 358   2022-12-15   
773-309 3   224C ONVOY, LLC 358   2023-07-14   
773-309 4   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2004-11-22   
773-309 5   624H ONVOY SPECTRUM, LLC 358   2022-01-07   
773-309 6   224C ONVOY, LLC 358   2004-09-16   
773-309 7   624H ONVOY SPECTRUM, LLC 358   2022-01-07   
773-309 8   318J COMCAST IP PHONE, LLC 358   2006-03-31   
773-309 9   829J PAETEC ITEL, LLC 358      
773-345 A BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-345 0   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-345 1   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-345 2   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-345 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-345 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-345 5   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-345 6   224C ONVOY, LLC 358   2017-06-26   
773-345 7   224C ONVOY, LLC 358   2017-12-09   
773-345 8   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-345 9   224C ONVOY, LLC 358   2019-07-07   
773-378 A CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 0   9329 ILLINOIS BELL TEL CO 358      
773-378 1   9329 ILLINOIS BELL TEL CO 358      
773-378 2   9329 ILLINOIS BELL TEL CO 358      
773-378 3   9329 ILLINOIS BELL TEL CO 358      
773-378 4   984E BANDWIDTH.COM CLEC, LLC - IL 358   2024-10-07   
773-378 5   9329 ILLINOIS BELL TEL CO 358      
773-378 6   9329 ILLINOIS BELL TEL CO 358      
773-378 7   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2019-10-22   
773-378 8   9329 ILLINOIS BELL TEL CO 358      
773-378 9   224C ONVOY, LLC 358   2019-07-07   
773-379 A CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-379 0   9329 ILLINOIS BELL TEL CO 358      
773-379 1   9329 ILLINOIS BELL TEL CO 358      
773-379 2   9329 ILLINOIS BELL TEL CO 358      
773-379 3   9329 ILLINOIS BELL TEL CO 358      
773-379 4   9329 ILLINOIS BELL TEL CO 358      
773-379 5   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2019-10-22   
773-379 6   495J STRATUS NETWORKS 358   2020-09-20   
773-379 7   9329 ILLINOIS BELL TEL CO 358      
773-379 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2019-10-22   
773-379 9   624H ONVOY SPECTRUM, LLC 358   2024-10-14   
773-413 A OKBRILOAXEX  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
773-413 0   984E BANDWIDTH.COM CLEC, LLC - IL 358   2008-12-12   
773-413 1   460K FIRST COMMUNICATIONS, LLC 358   2004-08-06   
773-413 2   624H ONVOY SPECTRUM, LLC 358   2022-01-07   
773-413 3   460K FIRST COMMUNICATIONS, LLC 358   2005-08-19   
773-413 4   624H ONVOY SPECTRUM, LLC 358   2022-01-07   
773-413 5   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
773-413 6   460K FIRST COMMUNICATIONS, LLC 358   2003-02-21   
773-413 7   516C AT&T CORP. 358   2006-05-02   
773-413 8   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-02-25   
773-413 9   984E BANDWIDTH.COM CLEC, LLC - IL 358   2008-12-12   
773-417 A CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358      
773-417 0   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-07-02   
773-417 1   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-07-02   
773-417 2   318J COMCAST IP PHONE, LLC 358      
773-417 3   318J COMCAST IP PHONE, LLC 358   2006-08-24   
773-417 4   318J COMCAST IP PHONE, LLC 358   2006-09-09   
773-417 5   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-07-02   
773-417 6   984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-06-13   
773-417 7   318J COMCAST IP PHONE, LLC 358   2008-11-26   
773-417 8   318J COMCAST IP PHONE, LLC 358   2008-11-26   
773-417 9   984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-06-13   

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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