phone book, or the business directory.

Illinois

Illinois is a midwestern state bordering Indiana in the east and the Mississippi River in the west. Nicknamed "the Prairie State," it's marked by farmland, forests, rolling hills and wetlands. Chicago, one of the largest cities in the U.S, is in the northeast on the shores of Lake Michigan. It’s famous for its skyscrapers, such as sleek, 1,451-ft. Willis Tower and the neo-Gothic Tribune Tower.

The state of Illinois has a population of 12,947,252, and is formerly abbreviated as IL. Illinois has 4,787,419 households in the state, with an average of 2.63 people living in each of them. Of the 12,947,252 people living in Illinois, 49.32% are male, 50.68% are female, 56.41% are married and 43.59% are single. 62.73% of existing homes are owned by inhabitants, with a median home cost of $176,120 in the state.

Air quality in Illinois is rated at 43.1/100, and water quality at 36/100. There are 210.6 physicians in Illinois per 100,000 of the population. Unemployment rates average 10.50% in the state and the sales tax rate is 8.00%.

Average income per household in Illinois is $55,396. 11.21% of households have income levels less than $15,000 per year. 20.12% of households have income levels between $50,000 and $75,000 annually, and 0.79% earn more than $500,000 per year.

Illinois Area Codes

Area code 217 serves the state of Illinois. This area code was assigned on January 1st, 1947. On January 1st, 1947 it went into service. 217 is a General Purpose Code. 217 service area does overlap with 447 area codes. Dialing pattern for local calls within the same NPA (area code) is 7D.

Area code 224 serves the state of Illinois. This area code was assigned on May 1st, 1998. On January 5th, 2002 it went into service. 224 is a General Purpose Code. 224 service area does overlap with 847 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.

Area code 309 serves the state of Illinois. This area code was assigned on January 1st, 1957. On January 1st, 1957 it went into service. 309 is a General Purpose Code. Dialing pattern for local calls within the same NPA (area code) is 7D.

Area code 312 serves the state of Illinois. This area code was assigned on January 1st, 1947. On January 1st, 1947 it went into service. 312 is a General Purpose Code. 312 service area does overlap with 872 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.

Area code 331 serves the state of Illinois. This area code was assigned on July 23rd, 1999. On October 7th, 2007 it went into service. 331 is a General Purpose Code. 331 service area does overlap with 630 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.

Telephone area code 708 covers western and southern Cook County and eastern and southern Will County in the state of Illinois, USA. Area code 708 was split off from area code 312 on November 11, 1989, and once covered almost all of the suburbs of Chicago.

Area code 618 serves the state of Illinois. This area code was assigned on January 1st, 1947. On January 1st, 1947 it went into service. 618 is a General Purpose Code. 618 service area does overlap with 730 area codes. Dialing pattern for local calls within the same NPA (area code) is 7D.

Area code 630 serves the state of Illinois. This area code was assigned on August 9th, 1994. On August 3rd, 1996 it went into service. 630 is a General Purpose Code. 630 service area does overlap with 331 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.

Area code 708 serves the state of Illinois. This area code was assigned on April 4th, 1988. On November 11th, 1989 it went into service. 708 is a General Purpose Code. 708 service area does overlap with 464 area codes. Dialing pattern for local calls within the same NPA (area code) is 7D.

Area code 773 serves the state of Illinois. This area code was assigned on February 29th, 1996. On October 12th, 1996 it went into service. 773 is a General Purpose Code. 773 service area does overlap with 872 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.

Area code 779 serves the state of Illinois. This area code was assigned on February 6th, 2004. On March 17th, 2007 it went into service. 779 is a General Purpose Code. 779 service area does overlap with 815 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.

Area code 815 serves the state of Illinois. This area code was assigned on January 1st, 1947. On January 1st, 1947 it went into service. 815 is a General Purpose Code. 815 service area does overlap with 779 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.

Area code 847 serves the state of Illinois. This area code was assigned on July 27th, 1995. On January 20th, 1996 it went into service. 847 is a General Purpose Code. 847 service area does overlap with 224 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.

Area code 872 serves the state of Illinois. This area code was assigned on July 23rd, 1999. On November 7th, 2009 it went into service. 872 is a General Purpose Code. 872 service area does overlap with 312 773 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.