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Phone Directory 312-624 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-624 Chicago, IL Rcn Telecom Services Of Illinois Cook Landline 05/10/1999

Other Series For Prefixes

312-6240###
312-6241###
312-6242###
312-6243###
312-6244###
312-6245###
312-6246###
312-6247###
312-6248###
312-6249###