Local Calling Guide

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

NXX: 789

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-789 A Chicago Zone 08-Portsmouth IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-789 0 Chicago Zone 08-Portsmouth IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2008-04-04   
773-789 1 Chicago Zone 08-Portsmouth IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2008-04-04   
773-789 2 Chicago Zone 08-Portsmouth IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358   2007-09-03   
773-789 3 Chicago Zone 08-Portsmouth IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2008-04-04   
773-789 4 Chicago Zone 08-Portsmouth IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2008-04-04   
773-789 5 Chicago Zone 08-Portsmouth IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2009-04-24   
773-789 6 Chicago Zone 08-Portsmouth IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2008-12-01   
773-789 7 Chicago Zone 08-Portsmouth IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2008-12-18   
773-789 8 Chicago Zone 08-Portsmouth IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2008-12-18   
773-789 9 Chicago Zone 08-Portsmouth IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2008-12-18   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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