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Phone Directory 312-559 Detail

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Illinois Chicago Central

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Example: (312) 559-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-559 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-5590###
312-5591###
312-5592###
312-5593###
312-5594###
312-5595###
312-5596###
312-5597###
312-5598###
312-5599###