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Phone Directory 312-730 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-730 Chicago, IL AT&T Local Cook Landline 01/25/1998

Other Series For Prefixes

312-7300###
312-7301###
312-7302###
312-7303###
312-7304###
312-7305###
312-7306###
312-7307###
312-7308###
312-7309###