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Phone Directory 815-399 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
815-399 Rockford, IL Ameritech Illinois Winnebago Landline 02/04/1994

Other Series For Prefixes

815-3990###
815-3991###
815-3992###
815-3993###
815-3994###
815-3995###
815-3996###
815-3997###
815-3998###
815-3999###