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Phone Directory 312-205 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-205 Chicago, IL Allegiance Telecom Cook Landline 08/20/2000

Other Series For Prefixes

312-2050###
312-2051###
312-2052###
312-2053###
312-2054###
312-2055###
312-2056###
312-2057###
312-2058###
312-2059###