Area Code 331

Area Code 331 is in Illinois

Other Illinois Area Codes
217, 224, 309, 312, 331, 618, 630, 708, 773, 779, 815, 847, 872

Illinois Area Code Overlays
(847 and 224) - (815 and 779)
(630 and 331) - (312 and 872)
(773 and 872)

Area Code 331 History:

10/07/2007
Area code 331 was put into service. Area code 331 is an overlay of area code 630.

Counties in Illinois within area code 331 include:

DuPage County, Kane County, Cook County, Will County, and Kendall County.

Major cities or places in Illinois within area code 331 include:

Area codes 331 and 630 serve many of the western suburbs of Chicago including the cities and communities of Aurora, Bartlett, Batavia, Bensenville, Bloomingdale, Bolingbrook, Carol Stream, Darien, Downers Grove, Elmhurst, Glen Ellyn, Glendale Heights, Hanover Park, Lisle, Lombard, Naperville, Roselle, St. Charles, Streamwood, Villa Park, West Chicago, Westmont, Wheaton and Woodridge in addition to many smaller communities within the area codes 331 and 630 service area.

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