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Area codes 815 and 779

October 15, 2023

Area codes 815 and 779 are telephone area codes in the North American Numbering Plan (NANP) for most of northern Illinois outside the Chicago and Quad Cities 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. Area code 779 was assigned to the same numbering plan area in 2009 to form an overlay.

All NPAs within Illinois

History Edit

When the American Telephone and Telegraph Company (AT&T) created the first nationwide telephone numbering plan for Operator Toll Dialing in 1947, the state of Illinois was divided into four numbering plan areas (NPAs), generally laid out as a southern, central, and northern area, and a region around and including the city of Chicago. The northern NPA was assigned area code 815 in the group of 86 original North American area codes.

After September 1956,[1] the 815 numbering plan area was divided roughly in half along a north-westerly to south-easterly running line, assigning area code 309 to its western part, including the Illinois side of the Quad Cities. The new area code was one of the first area codes not serving an entire state, but having the digit 0 in the middle position of the code. It was the only new area code created in Illinois between 1947 and the 1989 creation of area code 708. When forming 309 the area was combined with part of the northern portion of area code 217.[2]

In preparation of an overlay plan with the new area code 779, all calls from the 815 area needed to be dialed with an area code beginning on February 17, 2009. A month later, area code 779 was activated.

Service area Edit

See also Edit

References Edit

  1. ^ Notes on Distance Dialing. American Telephone and Telegraph Company. September 1956. p. Sec II-App A-1.
  2. ^ History of area code 309

External links Edit

  • NANPA area code map of Illinois
  • Area Code Overlay Approved for 815 Area Code - general information from AT&T, the RBOC for the area code
Illinois area codes: 217, 224/847, 309, 312, 331/630, 618, 708, 773, 779/815, 872
North: 353/608, 262
West: 563 Area codes 779 and 815 East: 847/224, 630/331, 708
South: 309/861, 217
Wisconsin area codes: 262, 414, 534/715, 608, 920
Indiana area codes: 219, 260, 317/463, 574, 765, 812/930
Iowa area codes: 319, 515, 563, 641, 712

40°11′44″N 89°31′00″W / 40.195659°N 89.516602°W / 40.195659; -89.516602

October 15, 2023
area, codes, telephone, area, codes, north, american, numbering, plan, nanp, most, northern, illinois, outside, chicago, quad, cities, areas, also, serves, joliet, area, some, chicago, western, northwestern, exurbs, four, original, illinois, area, codes, 1947,. Area codes 815 and 779 are telephone area codes in the North American Numbering Plan NANP for most of northern Illinois outside the Chicago and Quad Cities 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 Area code 779 was assigned to the same numbering plan area in 2009 to form an overlay All NPAs within Illinois Contents 1 History 2 Service area 3 See also 4 References 5 External linksHistory EditWhen the American Telephone and Telegraph Company AT amp T created the first nationwide telephone numbering plan for Operator Toll Dialing in 1947 the state of Illinois was divided into four numbering plan areas NPAs generally laid out as a southern central and northern area and a region around and including the city of Chicago The northern NPA was assigned area code 815 in the group of 86 original North American area codes After September 1956 1 the 815 numbering plan area was divided roughly in half along a north westerly to south easterly running line assigning area code 309 to its western part including the Illinois side of the Quad Cities The new area code was one of the first area codes not serving an entire state but having the digit 0 in the middle position of the code It was the only new area code created in Illinois between 1947 and the 1989 creation of area code 708 When forming 309 the area was combined with part of the northern portion of area code 217 2 In preparation of an overlay plan with the new area code 779 all calls from the 815 area needed to be dialed with an area code beginning on February 17 2009 A month later area code 779 was activated Service area EditAdeline Amboy Andres Apple River Argyle Aroma Park Ashkum Ashton Baileyville Ballou Belvidere Bonfield Bourbonnais Braceville Bradley Braidwood Brush Point Buckingham Buffalo Grove Bull Valley Byron Caledonia Capron Carbon Hill Cedar Point Cedarville Chadwick Chana Channahon Cherry Valley Clifton Coal City Coleta Coltonville Compton Coral Cortland Crest Hill Creston Crystal Lake Crystal Lawns Dakota Dana Danforth Davis Davis Junction Daysville Deer Grove DeKalb Diamond Dixon Durand Dwight Earlville East Brooklyn East Dubuque Egan Eleroy Elizabeth Elwood Esmond Essex Fairdale Fairmont Flagg Center Forreston Frankfort Frankfort Square Franklin Grove Freeport Fulton Galena Genoa Garden Prairie Gardner German Valley Gilman Godley Grand Detour Grand Ridge Grant Park Granville Greenwood Haldane Hanover Harmon Harrison Harvard Hebron Herscher Holiday Hills Homer Glen Hillcrest Hinckley Hopkins Park Ingalls Park Irwin Johnsburg Joliet Kangley Kankakee Kent Kings Kingston Kinsman Kirkland Lake Holiday Lake Summerset Lakemoor Lakewood Lakewood Shores Lanark LaSalle Leaf River Lee Leland Lena Leonore Lindenwood Lisbon Lockport Lostant Loves Park Lyndon Machesney Park Malta Manhattan Manteno Maple Park Marengo Marseilles Mazon McCullom Lake McHenry Mendota Menominee Meriden Millbrook Milledgeville Millington Minooka Mokena Momence Monee Monroe Center Morris Morrison Mount Carroll Mount Morris Naplate Nelson New Milford New Lenox Newark Nora North Utica Norway Odell Oglesby Onarga Oneco Orangeville Oregon Ottawa Paw Paw Paynes Point Pearl City Pecatonica Peotone Peru Plainfield Polo Pontiac Poplar Grove Prairie Grove Preston Heights Princeton Prophetstown Ransom Reddick Richmond Ridott Ringwood Ritchie Rochelle Rock City Rock Falls Rockdale Rockford Rockton Rodden Romeoville Roscoe Rutland St Anne Sandwich Savanna Scales Mound Seneca Serena Seward Shabbona Shannon Sheridan Shirland Shorewood Somonauk South Beloit South Wilmington Spring Grove Spring Valley Sterling Steward Stillman Valley Stockton Streator Sublette Sun River Terrace Sycamore Symerton Tampico Thomson Timberlane Toluca Tonica Triumph Troy Grove Union Union Hill Verona Waddams Grove Walnut Warren Waterman Watseka West Brooklyn Wenona Wilmington Wilton Wilton Center Winnebago Winslow Wonder Lake Wonder Lake CDP Woodstock WoosungSee also EditList of North American Numbering Plan area codes List of Illinois area codesReferences Edit Notes on Distance Dialing American Telephone and Telegraph Company September 1956 p Sec II App A 1 History of area code 309External links EditNANPA area code map of Illinois Area Code Overlay Approved for 815 Area Code general information from AT amp T the RBOC for the area codeIllinois area codes 217 224 847 309 312 331 630 618 708 773 779 815 872 North 353 608 262West 563 Area codes 779 and 815 East 847 224 630 331 708South 309 861 217Wisconsin area codes 262 414 534 715 608 920Indiana area codes 219 260 317 463 574 765 812 930Iowa area codes 319 515 563 641 71240 11 44 N 89 31 00 W 40 195659 N 89 516602 W 40 195659 89 516602 Retrieved from https en wikipedia org w index php title Area codes 815 and 779 amp oldid 1171115074, wikipedia, wiki, book, books, library,

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