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Phone Directory 312-397 Detail
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Illinois
Chicago
Central
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Area Code Prefixes
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Introduced
312-397
Chicago, IL
Ameritech Illinois
Cook
Landline
10/11/1997
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Description
Other Series For Prefixes
312-3970###
Search Complaints
312-3971###
Search Complaints
312-3972###
Search Complaints
312-3973###
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312-3974###
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312-3975###
Search Complaints
312-3976###
Search Complaints
312-3977###
Search Complaints
312-3978###
Search Complaints
312-3979###
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