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Phone Directory 312-454 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 454-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-454 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-4540###
312-4541###
312-4542###
312-4543###
312-4544###
312-4545###
312-4546###
312-4547###
312-4548###
312-4549###