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Niles, IL is currently using two area codes 224 and 847. Niles, IL utilizes an area code overlay in which area codes 224
and 847 serve the same geographic area. The area code overlay which is in use in Niles, IL today was established in 2002 at which time area code 224 was created as an overlay of area code 847. Area code 847
was originally established in 1996. Ten digit dialing (area code + seven digit number) is necessary in Niles because two different homes in the same geographic area can have the same seven digit phone number
but each would have a different area code.
Today, in addition to Niles, IL, area codes 224 and 847 serve the larger communities of Algonquin, Arlington Heights, Buffalo Grove, Carpentersville, Des
Plaines, Elgin, Elk Grove Village, Evanston, Glenview, Gurnee, Highland Park, Hoffman Estates, Lake Forest, Lake in the Hills, Libertyville, Morton Grove, Mount Prospect, Mundelein, North Chicago,
Northbrook, Palatine, Park Ridge, Rolling Meadows, Round Lake Beach, Schaumburg, Skokie, Vernon Hills, Waukegan, Wheeling, Wilmette and Zion, in addition to many smaller communities in northeastern Illinois.
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