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Phone Directory 312-742 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-742 Chicago, IL Ameritech Illinois Cook Landline 02/11/1995

Other Series For Prefixes

312-7420###
312-7421###
312-7422###
312-7423###
312-7424###
312-7425###
312-7426###
312-7427###
312-7428###
312-7429###