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Phone Directory 312-252 Detail

State Major City Time Zone
Illinois Chicago Central

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-252 Chicago, IL Allegiance Telecom Cook Landline 01/25/1998

Other Series For Prefixes

312-2520###
312-2521###
312-2522###
312-2523###
312-2524###
312-2525###
312-2526###
312-2527###
312-2528###
312-2529###