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Phone Directory 312-743 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 743-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-743 Chicago, IL Ameritech Illinois Cook Landline 11/15/2001

Other Series For Prefixes

312-7430###
312-7431###
312-7432###
312-7433###
312-7434###
312-7435###
312-7436###
312-7437###
312-7438###
312-7439###