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Phone Directory 312-712 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-712 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-7120###
312-7121###
312-7122###
312-7123###
312-7124###
312-7125###
312-7126###
312-7127###
312-7128###
312-7129###