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Phone Directory 312-904 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-904 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-9040###
312-9041###
312-9042###
312-9043###
312-9044###
312-9045###
312-9046###
312-9047###
312-9048###
312-9049###