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Phone Directory 312-992 Detail

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Illinois Chicago Central

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Example: (312) 992-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-992 Chicago, IL Ameritech Illinois Cook Landline 01/25/1998

Other Series For Prefixes

312-9920###
312-9921###
312-9922###
312-9923###
312-9924###
312-9925###
312-9926###
312-9927###
312-9928###
312-9929###