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Phone Directory 312-577 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 577-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-577 Chicago, IL Mci Worldcom Communications Cook Landline 01/11/1997

Other Series For Prefixes

312-5770###
312-5771###
312-5772###
312-5773###
312-5774###
312-5775###
312-5776###
312-5777###
312-5778###
312-5779###