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Phone Directory 312-591 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 591-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-591 Chicago, IL Ameritech Illinois Cook Landline 11/11/2003

Other Series For Prefixes

312-5910###
312-5911###
312-5912###
312-5913###
312-5914###
312-5915###
312-5916###
312-5917###
312-5918###
312-5919###