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Phone Directory 312-423 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-423 Chicago, IL Broadwing Communications Cook Landline 11/11/2003

Other Series For Prefixes

312-4230###
312-4231###
312-4232###
312-4233###
312-4234###
312-4235###
312-4236###
312-4237###
312-4238###
312-4239###