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Phone Directory 312-987 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-987 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-9870###
312-9871###
312-9872###
312-9873###
312-9874###
312-9875###
312-9876###
312-9877###
312-9878###
312-9879###