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Phone Directory 312-507 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 507-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-507 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-5070###
312-5071###
312-5072###
312-5073###
312-5074###
312-5075###
312-5076###
312-5077###
312-5078###
312-5079###