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Phone Directory 312-704 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 704-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-704 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-7040###
312-7041###
312-7042###
312-7043###
312-7044###
312-7045###
312-7046###
312-7047###
312-7048###
312-7049###