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Phone Directory 312-424 Detail

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Illinois Chicago Central

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Example: (312) 424-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-424 Chicago, IL Ameritech Illinois Cook Landline 09/11/1994

Other Series For Prefixes

312-4240###
312-4241###
312-4242###
312-4243###
312-4244###
312-4245###
312-4246###
312-4247###
312-4248###
312-4249###