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Phone Directory 312-665 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-665 Chicago, IL Teleport Communications America Cook Landline 01/25/1998

Other Series For Prefixes

312-6650###
312-6651###
312-6652###
312-6653###
312-6654###
312-6655###
312-6656###
312-6657###
312-6658###
312-6659###