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Phone Directory 312-645 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 645-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-645 Chicago, IL Ameritech Illinois Cook Landline 10/11/1997

Other Series For Prefixes

312-6450###
312-6451###
312-6452###
312-6453###
312-6454###
312-6455###
312-6456###
312-6457###
312-6458###
312-6459###