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Phone Directory 312-899 Detail

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Illinois Chicago Central

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Example: (312) 899-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-899 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-8990###
312-8991###
312-8992###
312-8993###
312-8994###
312-8995###
312-8996###
312-8997###
312-8998###
312-8999###