thedirectory - Area Code 331 History

Area Code 331 History - Illinois

Significant events for area code 331

Date
Details

August 3, 1996 Area code 331 was split from 708 .

October 7, 2007 Area code 331 was overlaid on 630 .

Date	Details
August 3, 1996	Area code 331 was split from 708 .
October 7, 2007	Area code 331 was overlaid on 630 .

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