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Phone Directory 312-225 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 225-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-225 Chicago, IL Ameritech Illinois Cook Landline 10/11/1997

Other Series For Prefixes

312-2250###
312-2251###
312-2252###
312-2253###
312-2254###
312-2255###
312-2256###
312-2257###
312-2258###
312-2259###