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Phone Directory 312-903 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-903 Chicago, IL American Messaging (am) Cook Cell Number 04/13/2001

Other Series For Prefixes

312-9030###
312-9031###
312-9032###
312-9033###
312-9034###
312-9035###
312-9036###
312-9037###
312-9038###
312-9039###