List of Illinois area codes
Encyclopedia
This is a list of the area codes in the state of Illinois and the regions that they cover:
of 1947, all of the Chicago area was covered by area code 312, the rest of northern Illinois was 815, central Illinois was 217, and southern Illinois was 618. In 1966, area code 309 was split off to cover western central Illinois (which was previously the southwestern part of area code 815). In 1990, area code 708 was split off to cover all of the suburbs in the Chicago metropolitan area (which is now covered by 847/224, 630/331, and 708) while the city of Chicago
kept the original 312. Area codes 847 (north suburbs) and 630 (west suburbs) were split off from the suburban area code 708 in 1996. Shortly after in 1996, area code 773 was created as an area code split to cover the residential parts of the city of Chicago while downtown kept the original 312 area code. Area code 847 almost immediately exhausted its numbers, so an overlay area code, 224, was implemented in 1996 for supplemental numbers. However, mandatory 11-digit dialing was not in effect until 2002. In March 2007, the overlay area code 331 was added for 630 area, as was the overlay area code 779 for 815. With the depletion of new numbers in area codes 312 and 773, an overlay of both of them, area code 872, was created in November 2009, beginning 11-digit dialing within the city limits of Chicago.
Area code 464 has been reserved for an overlay for 708, but has not been implemented and no timeline exists. Likewise, area code 447 has been reserved for an overlay of 217 and area code 730 reserved for an overlay of 618 in the near future, but no timelines exist. There are no immediate plans for relief for area code 309.
- 217Area code 217217 is the North American telephone area code for much of Central Illinois, including the capital city of Springfield as well as the cities of Champaign, Urbana, Decatur, Danville, Quincy, and Rantoul.-Communities included:...
: Central Illinois, running west from the Illinois-Indiana border through DanvilleDanville, IllinoisDanville is a city in Vermilion County, Illinois, United States. It is the principal city of the'Danville, Illinois Metropolitan Statistical Area' which encompasses all of Danville and Vermilion County. As of the 2010 census, the city had a total population of 32,467. It is the county seat of...
, EffinghamEffingham, IllinoisEffingham is a city in Effingham County, Illinois, United States. The population was 12,384 at the 2000 census. It is the county seat of Effingham County....
, Champaign-UrbanaChampaign-Urbana Metropolitan AreaThe Champaign-Urbana metropolitan area, also known as Champaign-Urbana, is a metropolitan area in east-central Illinois. It is the 191st largest metropolitan area in the U.S. It is composed of three counties, Champaign, Ford, and Piatt...
, DecaturDecatur, IllinoisDecatur is the largest city and the county seat of Macon County in the U.S. state of Illinois. The city, sometimes called "the Soybean Capital of the World", was founded in 1823 and is located along the Sangamon River and Lake Decatur in Central Illinois. In 2000 the city population was 81,500,...
, SpringfieldSpringfield, IllinoisSpringfield is the third and current capital of the US state of Illinois and the county seat of Sangamon County with a population of 117,400 , making it the sixth most populated city in the state and the second most populated Illinois city outside of the Chicago Metropolitan Area...
, QuincyQuincy, IllinoisQuincy, known as Illinois' "Gem City," is a river city along the Mississippi River and the county seat of Adams County. As of the 2010 census the city held a population of 40,633. The city anchors its own micropolitan area and is the economic and regional hub of West-central Illinois, catering a...
until Illinois' western border with Iowa. - 309Area code 309Area code 309 is a telephone area code serving the state of Illinois. This area code has been in service since 1966. It covers 21 counties, 501 ZIP codes, and 189 cities, including Bloomington, Canton, East Moline, Galesburg, Macomb, Moline, Morton, Normal, Pekin, Peoria and Rock Island, in...
: Central-Western Illinois including Bloomington-NormalBloomington-Normal, IllinoisBloomington-Normal refers to the twin municipalities of Bloomington and Normal in McLean County, in Central Illinois. The combined population of the two communities in a special census in 2006 was 125,000.-Sports:...
, PeoriaPeoria, IllinoisPeoria is the largest city on the Illinois River and the county seat of Peoria County, Illinois, in the United States. It is named after the Peoria tribe. As of the 2010 census, the city was the seventh-most populated in Illinois, with a population of 115,007, and is the third-most populated...
, and all the way west to the Illinois part of the Quad CitiesQuad CitiesThe Quad Cities is a group of five cities straddling the Mississippi River on the Iowa–Illinois boundary. These cities, Davenport and Bettendorf and Rock Island, Moline, and East Moline , are the center of the Quad Cities Metropolitan Area, which, as of 2010, had an estimated population of...
including MolineMoline, IllinoisMoline is a city located in Rock Island County, Illinois, United States, with a population of 45,792 in 2010. Moline is one of the Quad Cities, along with neighboring East Moline and Rock Island in Illinois and the cities of Davenport and Bettendorf in Iowa. The Quad Cities has a population of...
, and Rock IslandRock Island, IllinoisRock Island is the county seat of Rock Island County, Illinois, United States. The population was 40,884 at the 2010 census. Located on the Mississippi River, it is one of the Quad Cities, along with neighboring Moline, East Moline, and the Iowa cities of Davenport and Bettendorf. The Quad Cities...
. - 312Area code 312Area code 312 is the telephone area code for the Chicago Loop and surrounding areas of the city of Chicago, Illinois. Prior to the split on November 11, 1989, forming 708 , 312 area code originally served much of Greater Chicago...
: ChicagoChicagoChicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...
, the central city area including the Chicago LoopChicago LoopThe Loop or Chicago Loop is one of 77 officially designated Chicago community areas located in the City of Chicago, Illinois. It is the historic commercial center of downtown Chicago...
and the Near North SideNear North Side, ChicagoThe Near North Side is one of 77 well-defined community areas of Chicago, Illinois, United States. It is located north and east of the Chicago River, just north of the central business district . To its east is Lake Michigan and its northern boundary is the 19th-century city limit of Chicago,...
. - 630/331: West suburbs of Chicago in DuPage CountyDuPage County, IllinoisAs of the 2010 Census, the population of the county was 916,924, White Americans made up 77.9% of Dupage County's population; non-Hispanic whites represented 70.5% of the population. Black Americans made up 4.6% of the population. Native Americans made up 0.3% of Dupage County's population...
and Kane CountyKane County, IllinoisKane County is a county located in the U.S. state of Illinois. According to the 2010 census, it has a population of 515,269, which is an increase of 27.5% from 404,119 in 2000. Its county seat is Geneva, and its largest city is Aurora.- Geography :...
including WheatonWheaton, IllinoisWheaton is an affluent community located in DuPage County, Illinois, approximately west of Chicago and Lake Michigan. Wheaton is the county seat of DuPage County...
, NapervilleNaperville, IllinoisNaperville is a city in DuPage and Will Counties in Illinois in the United States, voted the second best place to live in the United States by Money Magazine in 2006. As of the 2010 census, the city had a total population of 141,853. It is the fifth largest city in the state, behind Chicago,...
, and AuroraAurora, IllinoisAurora is the second most populous city in the U.S. state of Illinois, and the 112th largest city in the United States. A suburb of Chicago, located west of the Loop, its population in 2010 was 197,899. Originally founded within Kane County, Aurora's city limits have expanded greatly over the past...
. Area code 630 was overlaid with area code 331 in 2007. - 618Area code 618Area code 618 is the telephone area code serving the southern part of Illinois. Periodically, proposals have been made for another area code in southern Illinois. Some of these proposals have involved an overlay, with others potentially reducing 618's physical size...
: Southern Illinois, Carbondale, IllinoisCarbondale, IllinoisCarbondale is a city in Jackson County, in the state of Illinois, within the Southern Illinois region. It is located at the junction of Illinois Route 13 and U.S. Route 51, southeast of St. Louis, Missouri, on the northern edge of the Shawnee National Forest... - 708Area code 708Area code 708 covers western and southern Cook County and eastern and southern Will County in Illinois. Area code 708 was split off from area code 312 on November 11th 1989, and once covered all of the suburbs of Chicago. In 1996, area code 847 and area code 630 were broken off from 708...
: South suburbs and inner west suburbs of Chicago, including the Chicago SouthlandChicago SouthlandThe Chicago Southland is the suburban region south and southwest of the City of Chicago, made up of approximately 70 municipalities. This region has been known as the Chicago Southland by the local populace and regional media for about 20 years....
and most west and south suburbs in Cook CountyCook County, IllinoisCook County is a county in the U.S. state of Illinois, with its county seat in Chicago. It is the second most populous county in the United States after Los Angeles County. The county has 5,194,675 residents, which is 40.5 percent of all Illinois residents. Cook County's population is larger than...
such as Oak ParkOak Park, IllinoisOak Park, Illinois is a suburb bordering the west side of the city of Chicago in Cook County, Illinois, United States. It is the twenty-fifth largest municipality in Illinois. Oak Park has easy access to downtown Chicago due to public transportation such as the Chicago 'L' Blue and Green lines,...
, Oak LawnOak Lawn, IllinoisOak Lawn is a village in Cook County, Illinois, United States. The population was 55,245 at the 2000 census.Oak Lawn is a suburb of the city of Chicago, located southwest of the city...
, Chicago HeightsChicago Heights, IllinoisChicago Heights is a city in Cook County, Illinois, United States. The population was 31,373 at the 2005 census. Chicago Heights is nicknamed 'Crossroads of the Nation'.-History:...
, and Orland ParkOrland Park, IllinoisOrland Park is a village in Cook County, Illinois, United States; it also extends slightly into Will County. The population was 56,767 at the 2010 census. The office of the Assistant Village Manager, Ellen Baer, states that the Will County section of Orland Park is industrial while the Cook County...
. - 773Area code 773Area code 773 went into effect in the city of Chicago, Illinois, on 12 October 1996. The area code covers the city, excluding the downtown core. Originally, the entire city and suburbs were in area code 312. Then, in 1989, area code 708 was created for the suburbs, leaving a rump 312...
: ChicagoChicagoChicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...
, covers most of the geographical area of Chicago except the downtown Chicago LoopChicago LoopThe Loop or Chicago Loop is one of 77 officially designated Chicago community areas located in the City of Chicago, Illinois. It is the historic commercial center of downtown Chicago...
, which is in area code 312. - 815/779Area codes 815 and 779Area code 815 is a telephone area code for most of the northern third of the state of Illinois, less the core of the Chicago metropolitan area and the area around Moline. It was one of the four original Illinois area codes set up in 1947. A new overlay area code, 779, was implemented on March 17,...
: Northern Illinois outside of the immediate Chicago area including JolietJoliet, IllinoisJoliet is a city in Will and Kendall Counties in the U.S. state of Illinois, located southwest of Chicago. It is the county seat of Will County. As of the 2010 census, the city was the fourth-most populated in Illinois, with a population of 147,433. It continues to be Illinois' fastest growing...
, KankakeeKankakee, IllinoisKankakee is a city in Kankakee County, Illinois, USA. As of the 2000 census, the city population was 25,561, and 26,840 as of a 2009 estimate. It is the county seat of Kankakee County...
, LaSalle, DeKalbDeKalb, IllinoisDeKalb is a city in DeKalb County, Illinois, United States. The population was 43,862 at the 2010 census, up from 39,018 at the 2000 census. The city is named after decorated German war hero Johann De Kalb, who died during the American Revolutionary War....
, and RockfordRockford, IllinoisRockford is a mid-sized city located on both banks of the Rock River in far northern Illinois. Often referred to as "The Forest City", Rockford is the county seat of Winnebago County, Illinois, USA. As reported in the 2010 U.S. census, the city was home to 152,871 people, the third most populated...
. Area code 815 was overlaid with area code 779 in 2007. - 847/224: North and northwest suburbs of Chicago including all of Lake CountyLake County, IllinoisLake County is a county in the northeastern corner of the state of Illinois, on the shore of Lake Michigan. According to the 2010 census, it has a population of 703,462, which is an increase of 9.2% from 644,356 in 2000. Its county seat is Waukegan. The county is part of the Chicago metropolitan area...
, as well as part of McHenry CountyMcHenry County, IllinoisMcHenry County is a county located in the U.S. state of Illinois. According to the 2010 census, it has a population of 308,760, which is an increase of 18.7% from 260,077 in 2000. Its county seat is Woodstock. This county is part of the Chicago metropolitan area. It is the sixth largest county, in...
and northern Cook County. This area includes EvanstonEvanston, IllinoisEvanston is a suburban municipality in Cook County, Illinois 12 miles north of downtown Chicago, bordering Chicago to the south, Skokie to the west, and Wilmette to the north, with an estimated population of 74,360 as of 2003. It is one of the North Shore communities that adjoin Lake Michigan...
, Des PlainesDes Plaines, IllinoisDes Plaines is a city in Cook County, Illinois, United States. It has adopted the official nickname of "City of Destiny." As of the 2000 census, the city had a total population of 58,720. It is a suburb of Chicago, and is next to O'Hare International Airport...
, WaukeganWaukegan, IllinoisWaukegan is a city and county seat of Lake County, Illinois. As of the 2000 census, the city had a total population of 87,901. The 2010 population was 89,078. It is the ninth-largest city in Illinois by population...
, and most of ElginElgin, IllinoisElgin is a city in northern Illinois located roughly northwest of Chicago on the Fox River. Most of Elgin lies within Kane County, Illinois, with a portion in Cook County, Illinois...
. Area code 847 was overlaid with area code 224 in 2002. - 872Area code 872Template:Cite webArea code 872 is a North American Numbering Plan overlay of area codes 312 and 773 in Chicago, Illinois, and entered service on November 7, 2009.-External links:* at North American Numbering Plan Administration's website*...
: City of Chicago, overlaying area codes 312 and 773.
History
In the original North American Numbering PlanNorth American Numbering Plan
The North American Numbering Plan is an integrated telephone numbering plan administered by Neustar which encompasses 24 countries and territories, including the United States and its territories, Canada, Bermuda, and 16 nations of the Caribbean...
of 1947, all of the Chicago area was covered by area code 312, the rest of northern Illinois was 815, central Illinois was 217, and southern Illinois was 618. In 1966, area code 309 was split off to cover western central Illinois (which was previously the southwestern part of area code 815). In 1990, area code 708 was split off to cover all of the suburbs in the Chicago metropolitan area (which is now covered by 847/224, 630/331, and 708) while the city of Chicago
Chicago
Chicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...
kept the original 312. Area codes 847 (north suburbs) and 630 (west suburbs) were split off from the suburban area code 708 in 1996. Shortly after in 1996, area code 773 was created as an area code split to cover the residential parts of the city of Chicago while downtown kept the original 312 area code. Area code 847 almost immediately exhausted its numbers, so an overlay area code, 224, was implemented in 1996 for supplemental numbers. However, mandatory 11-digit dialing was not in effect until 2002. In March 2007, the overlay area code 331 was added for 630 area, as was the overlay area code 779 for 815. With the depletion of new numbers in area codes 312 and 773, an overlay of both of them, area code 872, was created in November 2009, beginning 11-digit dialing within the city limits of Chicago.
Area code 464 has been reserved for an overlay for 708, but has not been implemented and no timeline exists. Likewise, area code 447 has been reserved for an overlay of 217 and area code 730 reserved for an overlay of 618 in the near future, but no timelines exist. There are no immediate plans for relief for area code 309.
See also
- List of North American Numbering Plan area codes
- North American Numbering PlanNorth American Numbering PlanThe North American Numbering Plan is an integrated telephone numbering plan administered by Neustar which encompasses 24 countries and territories, including the United States and its territories, Canada, Bermuda, and 16 nations of the Caribbean...