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Phone Directory 312-372 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-372 Chicago, IL Ameritech Illinois Cook Landline 11/11/2003

Other Series For Prefixes

312-3720###
312-3721###
312-3722###
312-3723###
312-3724###
312-3725###
312-3726###
312-3727###
312-3728###
312-3729###