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Phone Directory 312-600 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-600 Chicago, IL Neutral Tandem-illinois Cook Landline 05/01/2012

Other Series For Prefixes

312-6000###
312-6001###
312-6002###
312-6003###
312-6004###
312-6005###
312-6006###
312-6007###
312-6008###
312-6009###