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Phone Directory 312-390 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-390 Chicago, IL American Messaging (am) Cook Cell Number 04/16/2001

Other Series For Prefixes

312-3900###
312-3901###
312-3902###
312-3903###
312-3904###
312-3905###
312-3906###
312-3907###
312-3908###
312-3909###