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Phone Directory 312-788 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 788-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-788 Chicago, IL Ameritech Illinois Cook Landline 10/31/2000

Other Series For Prefixes

312-7880###
312-7881###
312-7882###
312-7883###
312-7884###
312-7885###
312-7886###
312-7887###
312-7888###
312-7889###