Search

Enter 10 Digit Phone Number
phone

Phone Directory 312-321 Detail

State Major City Time Zone
Illinois Chicago Central

Search

Advertisement

Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-321 Chicago, IL Ameritech Illinois Cook Landline 10/11/1997

Other Series For Prefixes

312-3210###
312-3211###
312-3212###
312-3213###
312-3214###
312-3215###
312-3216###
312-3217###
312-3218###
312-3219###