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Phone Directory 773-721 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
773-721 Chicago, IL Ameritech Illinois Cook Landline 10/15/1996

Other Series For Prefixes

773-7210###
773-7211###
773-7212###
773-7213###
773-7214###
773-7215###
773-7216###
773-7217###
773-7218###
773-7219###