Local Calling Guide

Area code/prefix search

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

NXX: 204

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-204 A Chicago Zone 07-Stewart IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2025-06-05   
773-204 5 Chicago Zone 07-Stewart IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2025-06-05   
773-204 6 Chicago Zone 07-Stewart IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2025-06-05   
773-204 7 Chicago Zone 07-Stewart IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2025-06-05   
773-204 8 Chicago Zone 07-Stewart IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2025-06-05   
773-204 9 Chicago Zone 07-Stewart IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2025-06-05   

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

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