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Phone Directory 312-797 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-797 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-7970###
312-7971###
312-7972###
312-7973###
312-7974###
312-7975###
312-7976###
312-7977###
312-7978###
312-7979###