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Phone Directory 312-558 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 558-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-558 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-5580###
312-5581###
312-5582###
312-5583###
312-5584###
312-5585###
312-5586###
312-5587###
312-5588###
312-5589###