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Phone Directory 312-943 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 943-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-943 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-9430###
312-9431###
312-9432###
312-9433###
312-9434###
312-9435###
312-9436###
312-9437###
312-9438###
312-9439###