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Phone Directory 312-793 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 793-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-793 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-7930###
312-7931###
312-7932###
312-7933###
312-7934###
312-7935###
312-7936###
312-7937###
312-7938###
312-7939###