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Phone Directory 312-442 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 442-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-442 Chicago, IL Ameritech Illinois Cook Landline 01/25/1998

Other Series For Prefixes

312-4420###
312-4421###
312-4422###
312-4423###
312-4424###
312-4425###
312-4426###
312-4427###
312-4428###
312-4429###