What is an Area Code? An area code is a section of a telephone number that denotes the broad area that the phone receiving the call is based in. Area codes were first introduced circa 1947 for operator use only. Area codes are three-digit numbers that represent Numbering Plan Areas (NPAs). The area code for a particular city or region is the series of numbers that you have to dial before someone’s number if you are making a phone call to that place from a different area. Area code 815 serves the state of Illinois.
The Table Below Shows the Towns and Cities That Use Area Code 815
| Adeline Amboy Apple Canyon Lake Apple River Arlington Aroma Park Ashkum Ashton Beaverville Belvidere Bonfield Bourbonnais Braceville Bradley Braidwood Buckingham Bull Valley Bureau Junction Byron Cabery Caledonia Campus Capron Carbon Hill Cedar Point Cedarville Chadwick Channahon Chatsworth Chebanse Chemung Chenoa Cherry Cherry Valley Cissna Park Clifton Coal City Coleta Como Compton Cornell Cortland Crescent City Crest Hill Creston Crystal Lake Crystal Lawns Cullom Dakota Dalzell Dana Danforth Davis Davis Junction Dayton Deer Grove DeKalb De Pue Diamond Dixon Donovan Dover Durand Dwight Earlville East Brooklyn East Dubuque | Elizabeth Elwood Emington Essex Fairbury Fairmont Flanagan Forrest Forreston Frankfort Frankfort Square Franklin Grove Freeport Fulton Galena Garden Prairie Gardner Genoa German Valley Gilman Godley Grand Detour Grand Ridge Grant Park Granville Greenwood Hanover Harmon Harvard Hebron Hennepin Herscher Hillcrest Hinckley Holiday Hills Hollowayville Hooppole Hopkins Park Ingalls Park Iroquois Irwin Johnsburg Joliet Kangley Kankakee Kempton Kingston Kinsman Kirkland Ladd Lake Holiday Lakemoor Lake Summerset Lakewood Lakewood Shores La Moille Lanark LaSalle Leaf River Lee Leland Lena Leonore Limestone Lisbon Lockport Long Point | Lostant Lost Nation Loves Park Lyndon McCullom Lake McHenry Machesney Park McNabb Magnolia Malden Malta Manhattan Manlius Manteno Maple Park Marengo Mark Marseilles Martinton Mazon Mendota Menominee Milford Millbrook Milledgeville Millington Minooka Momence Monroe Center Morris Morrison Mount Carroll Mount Morris Naplate Nelson Newark New Bedford New Lenox New Milford Nora North Utica Odell Oglesby Ohio Onarga Orangeville Oregon Ottawa Papineau Paw Paw Pearl City Pecatonica Peru Piper City Plainfield Plattville Polo Pontiac Poplar Grove Prairie Grove Preston Heights Princeton Prophetstown Ransom Reddick Richmond Ridott | Ringwood Rochelle Rock City Rockdale Rock Falls Rockford Rockton Romeoville Roscoe Rutland St. Anne Sammons Point Sandwich Saunemin Savanna Scales Mound Seatonville Seneca Shabbona Shannon Sheffield Sheldon Sheridan Shorewood Somonauk South Beloit South Wilmington Spring Grove Spring Valley Standard Sterling Steward Stillman Valley Stockton Strawn Streator Sublette Sun River Terrace Sycamore Symerton Tampico Thawville The Galena Territory Thomson Timberlane Tiskilwa Toluca Tonica Troy Grove Union Union Hill Verona Walnut Warren Waterman Watseka Wellington Wenona West Brooklyn Wilmington Winnebago Winslow Wonder Lake Woodland Woodstock Wyanet |