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Phone Directory 312-306 Detail

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Illinois Chicago Central

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Example: (312) 306-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-306 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-3060###
312-3061###
312-3062###
312-3063###
312-3064###
312-3065###
312-3066###
312-3067###
312-3068###
312-3069###