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Phone Directory 312-276 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-276 Chicago, IL Allegiance Telecom Cook Landline 01/25/1998

Other Series For Prefixes

312-2760###
312-2761###
312-2762###
312-2763###
312-2764###
312-2765###
312-2766###
312-2767###
312-2768###
312-2769###