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  2. Area codes 815 and 779 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_815_and_779

    Area code 309 was created by merging the western part of 815, including the Illinois side of the Quad Cities, with the northern portion of area code 217. 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 ...

  3. List of Illinois area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Illinois_area_codes

    In the group of original North American area codes, established in 1947, all of the Chicago metropolitan area was part of numbering plan area 312, the rest of northern Illinois was 815, central Illinois was 217, and southern Illinois was 618. In 1957, area code 815 was split for the assignment of area code 309 to western central Illinois.

  4. Area codes 309 and 861 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_309_and_861

    Sometime 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. It was the only new area code created in Illinois between 1947 and the 1989 creation of area code 708.

  5. Freeport, Illinois - Wikipedia

    en.wikipedia.org/wiki/Freeport,_Illinois

    The area code for Freeport is 815 with an overlay area code of 779 as of March 17, 2007. Climate and flooding ... Harry Boeke, Illinois state senator and businessman;

  6. Area code 815 - Wikipedia

    en.wikipedia.org/?title=Area_code_815&redirect=no

    Language links are at the top of the page. Search. Search

  7. Area code 312 - Wikipedia

    en.wikipedia.org/wiki/Area_code_312

    Area code 312. Coordinates: 41°52′48″N 87°37′54″W. All NPAs within Illinois. Area code 312 is a telephone area code in the North American Numbering Plan for the city of Chicago, including downtown, the Chicago Loop, and its immediate environs. The numbering plan area is completely surrounded by area code 773, which serves the rest of ...

  8. Chicago metropolitan area - Wikipedia

    en.wikipedia.org/wiki/Chicago_metropolitan_area

    From 1947 until 1988, the Illinois portion of the Chicago metro area was served by a single area code, 312, which abutted the 815 area code. In 1988 the 708 area code was introduced and the 312 area code became exclusive to the city of Chicago. It became common to call suburbanites "708'ers", in reference to their area code. The 708 area code ...

  9. Crescent City, Illinois - Wikipedia

    en.wikipedia.org/wiki/Crescent_City,_Illinois

    1,210.53/sq mi (467.76/km 2) ZIP code. 60928. Area code. 815. FIPS code. 17-17406. Crescent City is a village in Iroquois and Crescent townships, Iroquois County, Illinois, United States. The population was 552 at the 2020 census.