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Phone Directory 773-378 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (773) 378-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
773-378 Chicago, IL Ameritech Illinois Cook Landline 10/15/1996

Other Series For Prefixes

773-3780###
773-3781###
773-3782###
773-3783###
773-3784###
773-3785###
773-3786###
773-3787###
773-3788###
773-3789###