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Phone Directory 312-542 Detail

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Illinois Chicago Central

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Example: (312) 542-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-542 Chicago, IL Ameritech Illinois Cook Landline 01/25/1998

Other Series For Prefixes

312-5420###
312-5421###
312-5422###
312-5423###
312-5424###
312-5425###
312-5426###
312-5427###
312-5428###
312-5429###