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Phone Directory 312-842 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-842 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-8420###
312-8421###
312-8422###
312-8423###
312-8424###
312-8425###
312-8426###
312-8427###
312-8428###
312-8429###