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Phone Directory 312-300 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-300 Chicago, IL Net Talk.com Cook Landline 04/25/2011

Other Series For Prefixes

312-3000###
312-3001###
312-3002###
312-3003###
312-3004###
312-3005###
312-3006###
312-3007###
312-3008###
312-3009###