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Phone Directory 312-284 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 284-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-284 Chicago, IL Xo Illinois Cook Landline 06/30/2001

Other Series For Prefixes

312-2840###
312-2841###
312-2842###
312-2843###
312-2844###
312-2845###
312-2846###
312-2847###
312-2848###
312-2849###