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Phone Directory 312-853 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 853-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-853 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-8530###
312-8531###
312-8532###
312-8533###
312-8534###
312-8535###
312-8536###
312-8537###
312-8538###
312-8539###