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Phone Directory 312-974 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-974 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-9740###
312-9741###
312-9742###
312-9743###
312-9744###
312-9745###
312-9746###
312-9747###
312-9748###
312-9749###