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Phone Directory 312-673 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 673-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-673 Chicago, IL First Communications LLC Cook Landline 04/01/1997

Other Series For Prefixes

312-6730###
312-6731###
312-6732###
312-6733###
312-6734###
312-6735###
312-6736###
312-6737###
312-6738###
312-6739###