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Phone Directory 312-254 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 254-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-254 Chicago, IL Allegiance Telecom Cook Landline 01/25/1998

Other Series For Prefixes

312-2540###
312-2541###
312-2542###
312-2543###
312-2544###
312-2545###
312-2546###
312-2547###
312-2548###
312-2549###