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Phone Directory 312-503 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 503-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-503 Chicago, IL Broadwing Communications Cook Landline 02/04/1994

Other Series For Prefixes

312-5030###
312-5031###
312-5032###
312-5033###
312-5034###
312-5035###
312-5036###
312-5037###
312-5038###
312-5039###