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Phone Directory 312-787 Detail

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Illinois Chicago Central

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Example: (312) 787-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-787 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-7870###
312-7871###
312-7872###
312-7873###
312-7874###
312-7875###
312-7876###
312-7877###
312-7878###
312-7879###