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Phone Directory 312-233 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 233-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-233 Chicago, IL Ameritech Illinois Cook Landline 10/13/1999

Other Series For Prefixes

312-2330###
312-2331###
312-2332###
312-2333###
312-2334###
312-2335###
312-2336###
312-2337###
312-2338###
312-2339###