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Phone Directory 312-947 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 947-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-947 Chicago, IL Ameritech Illinois Cook Landline 11/18/2010

Other Series For Prefixes

312-9470###
312-9471###
312-9472###
312-9473###
312-9474###
312-9475###
312-9476###
312-9477###
312-9478###
312-9479###