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Phone Directory 312-997 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 997-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-997 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-9970###
312-9971###
312-9972###
312-9973###
312-9974###
312-9975###
312-9976###
312-9977###
312-9978###
312-9979###