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Phone Directory 312-660 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-660 Chicago, IL Teleport Communications America Cook Landline 01/25/1998

Other Series For Prefixes

312-6600###
312-6601###
312-6602###
312-6603###
312-6604###
312-6605###
312-6606###
312-6607###
312-6608###
312-6609###