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Phone Directory 815-664 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
815-664 Spring Valley, IL Frontier North Bureau Landline 02/04/1994

Other Series For Prefixes

815-6640###
815-6641###
815-6642###
815-6643###
815-6644###
815-6645###
815-6646###
815-6647###
815-6648###
815-6649###