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Phone Directory 312-664 Detail

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Illinois Chicago Central

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Example: (312) 664-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-664 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-6640###
312-6641###
312-6642###
312-6643###
312-6644###
312-6645###
312-6646###
312-6647###
312-6648###
312-6649###