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Phone Directory 312-475 Detail

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Illinois Chicago Central

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Example: (312) 475-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-475 Chicago, IL Ameritech Illinois Cook Landline 01/25/1998

Other Series For Prefixes

312-4750###
312-4751###
312-4752###
312-4753###
312-4754###
312-4755###
312-4756###
312-4757###
312-4758###
312-4759###