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Phone Directory 312-553 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 553-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-553 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-5530###
312-5531###
312-5532###
312-5533###
312-5534###
312-5535###
312-5536###
312-5537###
312-5538###
312-5539###