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Phone Directory 312-977 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-977 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-9770###
312-9771###
312-9772###
312-9773###
312-9774###
312-9775###
312-9776###
312-9777###
312-9778###
312-9779###