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Phone Directory 312-775 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-775 Chicago, IL Ameritech Illinois Cook Landline 10/13/1999

Other Series For Prefixes

312-7750###
312-7751###
312-7752###
312-7753###
312-7754###
312-7755###
312-7756###
312-7757###
312-7758###
312-7759###