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Phone Directory 312-791 Detail

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Illinois Chicago Central

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Example: (312) 791-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-791 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-7910###
312-7911###
312-7912###
312-7913###
312-7914###
312-7915###
312-7916###
312-7917###
312-7918###
312-7919###