Local Calling Guide

Area code/prefix search

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Chicago Zone 07-Oakland, IL

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
773-536 4 ELGNILOTGT5  5562 METROPCS, INC. 358   2014-07-27   
773-536 5 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-536 6 ELGNILOTGT5  5562 METROPCS, INC. 358   2014-07-27   
773-536 7 ELGNILOTGT5  5562 METROPCS, INC. 358   2014-08-05   
773-536 8 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-536 9 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-06-13   
773-538 A CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-538 0 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-538 1 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-538 2 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-538 3 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2012-10-20   
773-538 4 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-538 5 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-538 6 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2021-10-18   
773-538 7 ELGNILOTGT5  5562 METROPCS, INC. 358   2014-09-27   
773-538 8 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-538 9 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-548 A CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-548 0   515J IP HORIZON LLC 358   2016-08-09   
773-548 1 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-548 2 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2012-06-24   
773-548 3 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-548 4 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-548 5 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-548 6 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-548 7 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-548 8 CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-548 9 CHCGIL24XMD  495J STRATUS NETWORKS 358   2020-09-20   
773-624 A CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-855 A CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 0 CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 1 CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 2 CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 3 CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 4 CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 5 CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 6 CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-855 7 CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2006-07-03   
773-855 8 CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2006-06-23   
773-855 9 CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2006-07-05   
773-896 A BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-896 0 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2019-06-01   
773-896 1 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-03-02   
773-896 2 CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2000-03-06   
773-896 3 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2005-06-08   
773-896 4 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2007-06-10   
773-896 5 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2005-01-14   
773-896 6 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2005-01-14   
773-896 7 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2005-01-14   
773-896 8 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2005-06-08   

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

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