Area codes 815 and 779 are

telephone A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be easily heard directly. A telephone converts sound, typically and most efficiently the human voice, into e ...

area codes for most of

northern Illinois Northern Illinois is a region generally covering the northern third of the U.S. state of Illinois. The region is by far the most populous of Illinois with nearly 9.7 million residents as of 2010. Economics Northern Illinois is dominated by t ...

outside the

Chicago (''City in a Garden''); I Will , image_map = , map_caption = Interactive Map of Chicago , coordinates = , coordinates_footnotes = , subdivision_type = Country , subdivision_name ...

and

Quad Cities The Quad Cities is a region of cities (originally four, see History) in the U.S. states of Iowa and Illinois: Davenport and Bettendorf in southeastern Iowa, and Rock Island, Moline and East Moline in northwestern Illinois. These cities are t ...

areas. It also serves the Joliet area and some of Chicago’s western and northwestern exurbs. 815 was one of the four original Illinois area codes set up in 1947. It was split in 1957, when most of its western portion, including most of the Illinois side of the Quad Cities, was combined with part of the northern portion of

area code 217 Area codes 217 and 447 are telephone area codes in the North American Numbering Plan (NANP) for much of the central part of the U.S. state of Illinois. The numbering plan area (NPA) includes the state capital, Springfield, and Champaign, Urba ...

to form area code 309.History of area code 309
/ref> In preparation of an

overlay area code In telecommunications, an area code overlay complex is a telephone numbering plan that assigns multiple area codes to a geographic numbering plan area (NPA). Area code overlays are implemented in territories of the North American Numbering Pla ...

(779), all calls from the 815 area needed to be dialed with an area code beginning on February 17, 2009. A month later, the 779 code was activated.

Service area

Adeline Adeline may refer to: People *Adeline (given name) *Yves-Marie Adeline (born 1960), French Catholic writer Places *Adeline, Illinois, village in Maryland Township, Ogle County, Illinois, US Arts and entertainment *Adeline Records, recording lab ...

* Amboy * Andres * Apple River * Argyle * Aroma Park * Ashkum * Ashton * Baileyville * Ballou * Belvidere * Bonfield *

Bourbonnais Bourbonnais () was a historic province in the centre of France that corresponds to the modern ''département'' of Allier, along with part of the ''département'' of Cher. Its capital was Moulins. History The title of the ruler of Bourbonnais ...

* Braceville *

Bradley Bradley is an English surname derived from a place name meaning "broad wood" or "broad meadow" in Old English. Like many English surnames Bradley can also be used as a given name and as such has become popular. It is also an Anglicisation of t ...

* Braidwood * Brush Point * Buckingham *

Buffalo Grove Buffalo Grove, officially the Village of Buffalo Grove, is a village in Lake and Cook County, Illinois. A suburb of Chicago, it lies about northwest of Downtown Chicago. As of the 2020 Census, Buffalo Grove has a population of 43,212. It tota ...

* Bull Valley *

Byron George Gordon Byron, 6th Baron Byron (22 January 1788 – 19 April 1824), known simply as Lord Byron, was an English romantic poet and peer. He was one of the leading figures of the Romantic movement, and has been regarded as among the ...

* Caledonia * Capron * Carbon Hill * Cedar Point * Cedarville * Chadwick * Chana * Channahon * Cherry Valley * Clifton * Coal City * Coleta * Coltonville * Compton *

Coral Corals are marine invertebrates within the class Anthozoa of the phylum Cnidaria. They typically form compact colonies of many identical individual polyps. Coral species include the important reef builders that inhabit tropical oceans and ...

* Cortland * Crest Hill * Creston *

Crystal Lake Crystal Lake or Crystal Lakes may refer to: Lakes Canada * Crystal Lake (Saskatchewan) * Crystal Lake (Ontario), drain into the Lynn River, which drains into Lake Erie United States * Crystal Lake, California, a mountain lake in Nevad ...

* Crystal Lawns *

Dakota Dakota may refer to: * Dakota people, a sub-tribe of the Sioux ** Dakota language, their language Dakota may also refer to: Places United States * Dakota, Georgia, an unincorporated community * Dakota, Illinois, a town * Dakota, Minnesota, ...

* Dana * Danforth * Davis * Davis Junction * Daysville * Deer Grove *

DeKalb DeKalb or De Kalb may refer to: People * Baron Johann de Kalb (1721–1780), major general in the American Revolutionary War Places Municipalities in the United States * DeKalb, Illinois, the largest city in the United States named DeKalb **DeKal ...

Diamond Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Another solid form of carbon known as graphite is the chemically stable form of carbon at room temperature and pressure, ...

* Dixon * Durand * Dwight * Earlville * East Brooklyn * East Dubuque * Egan * Eleroy *

Elizabeth Elizabeth or Elisabeth may refer to: People * Elizabeth (given name), a female given name (including people with that name) * Elizabeth (biblical figure), mother of John the Baptist Ships * HMS ''Elizabeth'', several ships * ''Elisabeth'' (sch ...

* Elwood * Esmond *

Essex Essex () is a county in the East of England. One of the home counties, it borders Suffolk and Cambridgeshire to the north, the North Sea to the east, Hertfordshire to the west, Kent across the estuary of the River Thames to the south, and Grea ...

* Fairdale * Fairmont * Flagg Center * Forreston * Frankfort * Frankfort Square * Franklin Grove * Freeport *

Fulton Fulton may refer to: People * Robert Fulton (1765–1815), American engineer and inventor who developed the first commercially successful steam-powered ship * Fulton (surname) Given name * Fulton Allem (born 1957), South African golfer * Fult ...

* Galena *

Genoa Genoa ( ; it, Genova ; lij, Zêna ). is the capital of the Italian region of Liguria and the sixth-largest city in Italy. In 2015, 594,733 people lived within the city's administrative limits. As of the 2011 Italian census, the Province of ...

* Garden Prairie * Gardner * German Valley * Gilman * Godley * Grand Detour * Grand Ridge * Grant Park * Granville * Greenwood * Haldane *

Hanover Hanover (; german: Hannover ; nds, Hannober) is the capital and largest city of the German state of Lower Saxony. Its 535,932 (2021) inhabitants make it the 13th-largest city in Germany as well as the fourth-largest city in Northern Germany ...

* Harmon *

Harrison Harrison may refer to: People * Harrison (name) * Harrison family of Virginia, United States Places In Australia: * Harrison, Australian Capital Territory, suburb in the Canberra district of Gungahlin In Canada: * Inukjuak, Quebec, or " ...

* Harvard *

Hebron Hebron ( ar, الخليل or ; he, חֶבְרוֹן ) is a Palestinian. city in the southern West Bank, south of Jerusalem. Nestled in the Judaean Mountains, it lies above sea level. The second-largest city in the West Bank (after Eas ...

* Herscher * Holiday Hills *

Homer Glen Homer Glen is a village, located southwest of downtown Chicago, in Homer Township, Will County, Illinois. It is a southwest suburb of Chicago. Per the 2020 census, the population was 24,543. The village was incorporated on April 17, 2001. The ...

* Hillcrest *

Hinckley Hinckley is a market town in south-west Leicestershire, England. It is administered by Hinckley and Bosworth Borough Council. Hinckley is the third largest settlement in the administrative county of Leicestershire, after Leicester and Loughbo ...

* Hopkins Park * Ingalls Park *

Irwin Irwin may refer to: Places ;United States * Irwin, California * Irwin, Idaho * Irwin, Illinois * Irwin, Iowa * Irwin, Nebraska * Irwin, Ohio * Irwin, Pennsylvania * Irwin, South Carolina * Irwin County, Georgia * Irwin Township, Venango County ...

* Johnsburg * Joliet * Kangley * Kankakee *

Kent Kent is a county in South East England and one of the home counties. It borders Greater London to the north-west, Surrey to the west and East Sussex to the south-west, and Essex to the north across the estuary of the River Thames; it faces ...

* Kings * Kingston * Kinsman * Kirkland * Lake Holiday * Lake Summerset * Lakemoor * Lakewood * Lakewood Shores *

Lanark Lanark (; gd, Lannraig ; sco, Lanrik) is a town in South Lanarkshire, Scotland, located 20 kilometres to the south-east of Hamilton. The town lies on the River Clyde, at its confluence with Mouse Water. In 2016, the town had a population of 9 ...

* LaSalle * Leaf River * Lee * Leland *

Lena Lena or LENA may refer to: Places * Léna Department, a department of Houet Province in Burkina Faso * Lena, Manitoba, an unincorporated community located in Killarney-Turtle Mountain municipality in Manitoba, Canada * Lena, Norway, a village in ...

* Leonore *

Lindenwood Lindenwood may refer to a place in the United States: *Lindenwood, Illinois *Lindenwood, Queens, New York *Lindenwood Cemetery, Fort Wayne, Indiana In education: * Lindenwood University Lindenwood University is a private university in St. Ch ...

* Lisbon * Lockport * Lostant * Loves Park *

Lyndon Lyndon may refer to: Places * Lyndon, Alberta, Canada * Lyndon, Rutland, East Midlands, England * Lyndon, Solihull, West Midlands, England United States * Lyndon, Illinois * Lyndon, Kansas * Lyndon, Kentucky * Lyndon, New York * Lyndon, Ohio * ...

* Machesney Park *

Malta Malta ( , , ), officially the Republic of Malta ( mt, Repubblika ta' Malta ), is an island country in the Mediterranean Sea. It consists of an archipelago, between Italy and Libya, and is often considered a part of Southern Europe. It lies ...

Manhattan Manhattan (), known regionally as the City, is the most densely populated and geographically smallest of the five boroughs of New York City. The borough is also coextensive with New York County, one of the original counties of the U.S. state ...

* Manteno * Maple Park * Marengo * Marseilles * Mazon * McCullom Lake * McHenry * Mendota *

Menominee The Menominee (; mez, omǣqnomenēwak meaning ''"Menominee People"'', also spelled Menomini, derived from the Ojibwe language word for "Wild Rice People"; known as ''Mamaceqtaw'', "the people", in the Menominee language) are a federally recog ...

* Meriden * Millbrook * Milledgeville * Millington * Minooka * Mokena * Momence * Monee * Monroe Center *

Morris Morris may refer to: Places Australia *St Morris, South Australia, place in South Australia Canada * Morris Township, Ontario, now part of the municipality of Morris-Turnberry * Rural Municipality of Morris, Manitoba ** Morris, Manitob ...

* Morrison * Mount Carroll * Mount Morris * Naplate *

Nelson Nelson may refer to: Arts and entertainment * ''Nelson'' (1918 film), a historical film directed by Maurice Elvey * ''Nelson'' (1926 film), a historical film directed by Walter Summers * ''Nelson'' (opera), an opera by Lennox Berkeley to a lib ...

* New Milford * New Lenox * Newark *

Nora Nora, NORA, or Norah may refer to: * Nora (name), a feminine given name People with the surname * Arlind Nora (born 1980), Albanian footballer * Pierre Nora (born 1931), French historian Places Australia * Norah Head, New South Wales, headlan ...

* North Utica *

Norway Norway, officially the Kingdom of Norway, is a Nordic country in Northern Europe, the mainland territory of which comprises the western and northernmost portion of the Scandinavian Peninsula. The remote Arctic island of Jan Mayen and the ...

* Odell * Oglesby * Onarga *

Oneco Oneco (sometimes called Owaneko) was a sachem of the Mohegans in the Connecticut Colony and the son of Uncas. During King Philip's War (1675–78) he distinguished himself as a battlefield commander and has been credited as one of the executioner ...

* Orangeville *

Oregon Oregon () is a state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington, while the Snake River delineates much of its eastern boundary with Idaho. T ...

* Ottawa * Paw Paw * Paynes Point *

Pearl City Pearl City is an unincorporated community and census-designated place (CDP) located in the Ewa District and City & County of Honolulu on the Island of Oahu. As of the 2010 Census, the CDP had a total population of 47,698. Pearl City is located ...

* Pecatonica *

Peotone Peotone () is a village in Will County, Illinois, United States. The population was 4,142 at the 2010 census, an increase from 3,385 in 2000. The city is about south of Chicago. The village is home to the Peotone High School Blue Devils. History ...

Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = National seal , national_motto = "Firm and Happy f ...

* Plainfield * Polo *

Pontiac Pontiac may refer to: *Pontiac (automobile), a car brand *Pontiac (Ottawa leader) ( – 1769), a Native American war chief Places and jurisdictions Canada *Pontiac, Quebec, a municipality ** Apostolic Vicariate of Pontiac, now the Roman Catholic D ...

* Poplar Grove * Prairie Grove * Preston Heights *

Princeton Princeton University is a private research university in Princeton, New Jersey. Founded in 1746 in Elizabeth as the College of New Jersey, Princeton is the fourth-oldest institution of higher education in the United States and one of the ni ...

* Prophetstown * Ransom * Reddick * Richmond * Ridott * Ringwood * Ritchie * Rochelle * Rock City * Rock Falls * Rockdale * Rockford * Rockton * Rodden * Romeoville * Roscoe * Rutland * St. Anne *

Sandwich A sandwich is a food typically consisting of vegetables, sliced cheese or meat, placed on or between slices of bread, or more generally any dish wherein bread serves as a container or wrapper for another food type. The sandwich began as a po ...

Savanna A savanna or savannah is a mixed woodland- grassland (i.e. grassy woodland) ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to ...

* Scales Mound *

Seneca Seneca may refer to: People and language * Seneca (name), a list of people with either the given name or surname * Seneca people, one of the six Iroquois tribes of North America ** Seneca language, the language of the Seneca people Places Extrat ...

* Serena * Seward *

Shabbona Shabbona (or Sha-bon-na), also known as ShaboneeShannon * Sheridan * Shirland * Shorewood * Somonauk * South Beloit * South Wilmington * Spring Grove * Spring Valley * Sterling * Steward * Stillman Valley * Stockton * Streator * Sublette * Sun River Terrace *

Sycamore Sycamore is a name which has been applied to several types of trees, but with somewhat similar leaf forms. The name derives from the ancient Greek ' (''sūkomoros'') meaning "fig-mulberry". Species of trees known as sycamore: * ''Acer pseudoplata ...

* Symerton *

Tampico Tampico is a city and port in the southeastern part of the state of Tamaulipas, Mexico. It is located on the north bank of the Pánuco River, about inland from the Gulf of Mexico, and directly north of the state of Veracruz. Tampico is the fifth ...

* Thomson * Timberlane *

Toluca Toluca , officially Toluca de Lerdo , is the state capital of the State of Mexico as well as the seat of the Municipality of Toluca. With a population of 910,608 as of the 2020 census, Toluca is the fifth most populous city in Mexico. The city f ...

* Tonica *

Triumph The Roman triumph (Latin triumphus) was a celebration for a victorious military commander in ancient Rome. For later imitations, in life or in art, see Trionfo. Numerous later uses of the term, up to the present, are derived directly or indirectl ...

* Troy Grove *

Union Union commonly refers to: * Trade union, an organization of workers * Union (set theory), in mathematics, a fundamental operation on sets Union may also refer to: Arts and entertainment Music * Union (band), an American rock group ** ''Un ...

* Union Hill *

Verona Verona ( , ; vec, Verona or ) is a city on the Adige River in Veneto, Italy, with 258,031 inhabitants. It is one of the seven provincial capitals of the region. It is the largest city municipality in the region and the second largest in nor ...

* Waddams Grove *

Walnut A walnut is the edible seed of a drupe of any tree of the genus ''Juglans'' (family Juglandaceae), particularly the Persian or English walnut, '' Juglans regia''. Although culinarily considered a "nut" and used as such, it is not a true ...

Warren A warren is a network of wild rodent or lagomorph, typically rabbit burrows. Domestic warrens are artificial, enclosed establishment of animal husbandry dedicated to the raising of rabbits for meat and fur. The term evolved from the medieval A ...

* Waterman * Watseka * West Brooklyn * Wenona * Wilmington * Wilton * Wilton Center * Winnebago *

Winslow Winslow may refer to: Places United Kingdom * Winslow, Buckinghamshire, England, a market town and civil parish * Winslow Rural District, Buckinghamshire, a rural district from 1894 to 1974 United States and Canada * Rural Municipality of Winslo ...

* Wonder Lake * Wonder Lake (CDP) *

Woodstock Woodstock Music and Art Fair, commonly referred to as Woodstock, was a music festival held during August 15–18, 1969, on Max Yasgur's dairy farm in Bethel, New York, United States, southwest of the town of Woodstock. Billed as "an Aq ...

* Woosung

References

External links

Area Code Overlay Approved for 815 Area Code
- general information from

AT&T AT&T Inc. is an American multinational telecommunications holding company headquartered at Whitacre Tower in Downtown Dallas, Texas. It is the world's largest telecommunications company by revenue and the third largest provider of mobile te ...

, the

RBOC The Regional Bell Operating Companies (RBOC) are the result of '' United States v. AT&T'', the U.S. Department of Justice antitrust suit against the former American Telephone & Telegraph Company (later known as AT&T Corp.). On January 8, 1 ...

for the area code
List of exchanges from AreaCodeDownload.com, 815 Area Code

{{Coord, 40.195659, N, 89.516602, W, region:US-IL, display=title Telecommunications-related introductions in 1947 Telecommunications-related introductions in 2007 815 and 779 815 and 779

Service area

See also

References

External links