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Phone Directory 312-554 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 554-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-554 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-5540###
312-5541###
312-5542###
312-5543###
312-5544###
312-5545###
312-5546###
312-5547###
312-5548###
312-5549###