Local Calling Guide

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NPA: 773 [Rate centres in NPA 773] [Dial plan for NPA 773]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-448 4 Chicago Zone 07-Stewart IL   224C ONVOY, LLC 358   2026-02-20   
773-448 5 Chicago Zone 07-Stewart IL   224C ONVOY, LLC 358   2026-03-26   
773-448 6 Chicago Zone 07-Stewart IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2025-12-08   
773-448 7 Chicago Zone 07-Stewart IL   224C ONVOY, LLC 358   2026-01-11   
773-448 8 Chicago Zone 07-Stewart IL   224C ONVOY, LLC 358   2026-01-11   
773-448 9 Chicago Zone 07-Stewart IL   224C ONVOY, LLC 358   2026-01-11   
773-449 A Chicago Zone 09-Mitchell IL CHCGIL24SMD  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-449 0 Chicago Zone 09-Mitchell IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-27   
773-449 1 Chicago Zone 09-Mitchell IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-27   
773-449 2 Chicago Zone 09-Mitchell IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2004-07-16   
773-449 3 Chicago Zone 09-Mitchell IL CHCGIL24SMD  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-449 4 Chicago Zone 09-Mitchell IL CHCGIL24SMD  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-449 5 Chicago Zone 09-Mitchell IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2004-01-21   
773-449 6 Chicago Zone 09-Mitchell IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2006-12-11   
773-449 7 Chicago Zone 09-Mitchell IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-27   
773-449 8 Chicago Zone 09-Mitchell IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-27   
773-449 9 Chicago Zone 09-Mitchell IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-02-17   
773-450 A Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
773-451 A Chicago Zone 07-Oakland IL CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-451 0 Chicago Zone 07-Oakland IL CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-451 1 Chicago Zone 07-Oakland IL CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-451 2 Chicago Zone 07-Oakland IL CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-451 3 Chicago Zone 07-Oakland IL CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-451 4 Chicago Zone 07-Oakland IL CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-451 5 Chicago Zone 07-Oakland IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2008-12-12   
773-451 6 Chicago Zone 07-Oakland IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2006-03-05   
773-451 7 Chicago Zone 07-Oakland IL CHCGILWUKMD  939H COMMIO, LLC 358   2021-08-29   
773-451 8 Chicago Zone 07-Oakland IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-10-13   
773-451 9 Chicago Zone 07-Oakland IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-10-13   
773-452 A Chicago Zone 01-Wabash IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
773-453 A Chicago Zone 11-O'Hare IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-453 0 Chicago Zone 11-O'Hare IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-453 2 Chicago Zone 11-O'Hare IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-05-19   
773-453 3 Chicago Zone 11-O'Hare IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-453 4 Chicago Zone 11-O'Hare IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2012-06-01   
773-453 5 Chicago Zone 11-O'Hare IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-05-19   
773-453 6 Chicago Zone 11-O'Hare IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2013-05-06   
773-453 7 Chicago Zone 11-O'Hare IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2013-12-13   
773-453 8 Chicago Zone 11-O'Hare IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2013-12-13   
773-453 9 Chicago Zone 11-O'Hare IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2013-12-13   
773-454 A Chicago Zone 03-Kildare IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-454 0 Chicago Zone 03-Kildare IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-454 1 Chicago Zone 03-Kildare IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-454 2 Chicago Zone 03-Kildare IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-454 3 Chicago Zone 03-Kildare IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-454 4 Chicago Zone 03-Kildare IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-454 5 Chicago Zone 03-Kildare IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-454 6 Chicago Zone 03-Kildare IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-454 7 Chicago Zone 03-Kildare IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-454 8 Chicago Zone 03-Kildare IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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