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Phone Directory 312-278 Detail

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Illinois Chicago Central

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Example: (312) 278-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-278 Chicago, IL Broadwing Communications Cook Landline 10/31/2000

Other Series For Prefixes

312-2780###
312-2781###
312-2782###
312-2783###
312-2784###
312-2785###
312-2786###
312-2787###
312-2788###
312-2789###