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Phone Directory 312-755 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 755-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-755 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-7550###
312-7551###
312-7552###
312-7553###
312-7554###
312-7555###
312-7556###
312-7557###
312-7558###
312-7559###