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Phone Directory 312-954 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 954-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-954 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-9540###
312-9541###
312-9542###
312-9543###
312-9544###
312-9545###
312-9546###
312-9547###
312-9548###
312-9549###