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Phone Directory 312-781 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-781 Chicago, IL Ameritech Illinois Cook Landline 11/11/2003

Other Series For Prefixes

312-7810###
312-7811###
312-7812###
312-7813###
312-7814###
312-7815###
312-7816###
312-7817###
312-7818###
312-7819###