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Phone Directory 312-642 Detail

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Illinois Chicago Central

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Example: (312) 642-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-642 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-6420###
312-6421###
312-6422###
312-6423###
312-6424###
312-6425###
312-6426###
312-6427###
312-6428###
312-6429###