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Phone Directory 312-799 Detail

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Illinois Chicago Central

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Example: (312) 799-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-799 Chicago, IL Ameritech Illinois Cook Landline 06/13/2000

Other Series For Prefixes

312-7990###
312-7991###
312-7992###
312-7993###
312-7994###
312-7995###
312-7996###
312-7997###
312-7998###
312-7999###