Area codes 847 and 224 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of Illinois. The numbering plan area (NPA) comprises the northeastern part of Illinois and many northern suburbs of Chicago. This includes most of Lake County, the northern part of Cook County, the northern part of Kane County, and a small part of McHenry County. Area code 847 was created on January 20, 1996, in a three-way split of area code 708. Within only five years, 847 was already close to exhaustion from the rapid growth in telecommunication services in the Chicago suburbs and the proliferation of cell phones and pagers. On January 5, 2002, area code 224 was assigned to overlay area code 847. This required ten-digit dialing in all affected communities. Service area Algonquin Antioch Arlington Heights Bannockburn Barrington Barrington Hills Beach Park Buffalo Grove Burlington Carpentersville Cary Channel Lake Deerfield Deer Park Des Plaines East Dundee Elgin Elk Grove Village Evanston Forest Lake Fox Lake Fox Lake Hills Fox River Grove Franklin Park Gages Lake Gilberts Glencoe Glenview Golf Grandwood Park Grayslake Great Lakes, Illinois Green Oaks Gurnee Hainesville Hampshire Hawthorn Woods Highland Park Highwood Hoffman Estates Huntley Indian Creek Ingleside Island Lake Inverness Kenilworth Kildeer Knollwood Lake Barrington Lake Bluff Lake Catherine Lake Forest Lake in the Hills Lake Villa Lake Zurich Libertyville Lincolnshire Lincolnwood Lindenhurst Long Grove Long Lake Melrose Park (unincorporated) Mettawa Morton Grove Mount Prospect Mundelein Niles North Barrington Northbrook North Chicago Oakwood Hills Old Mill Creek Palatine Park City Park Ridge Pingree Grove Port Barrington Prairie View Prospect Heights Riverwoods Rolling Meadows Rondout Rosemont Round Lake Round Lake Beach Round Lake Heights Round Lake Park Schiller Park Schaumburg Skokie Sleepy Hollow South Barrington South Elgin Third Lake Tower Lakes Trout Valley Venetian Village Vernon Hills Volo Wadsworth Wauconda Waukegan West Dundee Wheeling Wilmette Winnetka Winthrop Harbor Zion See also List of North American Numbering Plan area codes List of Illinois area codes External links List of exchanges from AreaCodeDownload.com, 847 Area Code List of exchanges from AreaCodeDownload.com, 224 Area Code Telecommunications-related introductions in 1996 Telecommunications-related introductions in 2002 847 and 224 847 and 224