Area Code 224 History:
Area code 224 was put into service on 01/05/2002. Area code 224 is an overlay of area code 847.
Counties in Illinois within area code 224 include:
Cook County, Kane County, Lake County, McHenry County.
Major cities or places in Illinois within area code 224 include:
Area codes 224 and 847 serve northeastern Illinois including the larger cities and communities of 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, Niles, 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 within the service area.