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Phone Directory 312-321 Detail
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Illinois
Chicago
Central
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Area Code Prefixes
Prefix
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Introduced
312-321
Chicago, IL
Ameritech Illinois
Cook
Landline
10/11/1997
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Description
Other Series For Prefixes
312-3210###
Search Complaints
312-3211###
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312-3212###
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312-3213###
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312-3214###
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312-3215###
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312-3216###
Search Complaints
312-3217###
Search Complaints
312-3218###
Search Complaints
312-3219###
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