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2. List of Illinois area codes - Wikipedia

   en.wikipedia.org/wiki/List_of_Illinois_area_codes

   773: Chicago, covers most of the geographical area of Chicago except the downtown Chicago Loop, which is in area code 312. 815/779: Northern Illinois outside of the immediate Chicago area including Joliet, Kankakee, LaSalle, DeKalb, and Rockford. Area code 815 was overlaid with area code 779 in 2007. 847/224: North and northwest suburbs of ...

3. 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 ...

4. Area codes 630 and 331 - Wikipedia

   en.wikipedia.org/wiki/Area_codes_630_and_331

   On October 7, 2007, area code 331 began overlaying area code 630, making ten-digit dialing mandatory in the area. The Illinois side of the Chicago area–312/773/872, 708, 847/224, 630/331 and portions of 815/779–is one of the largest local calling areas in the United States; with few exceptions, no long-distance charges are applied from one ...

5. Chicago metropolitan area - Wikipedia

   en.wikipedia.org/wiki/Chicago_metropolitan_area

   The Chicago metropolitan area, also referred to as the Greater Chicago Area and Chicagoland, is the largest metropolitan statistical area in the U.S. state of Illinois, and the Midwest, containing the City of Chicago along with its surrounding suburbs and satellite cities. Encompassing 10,286 square mi (28,120 km 2), the metropolitan area ...

6. Original North American area codes - Wikipedia

   en.wikipedia.org/wiki/Original_North_American...

   In 1948, northern Indiana received an extra area code for its Chicago suburbs by dividing area code 317. [22] In 1950, southwest Missouri, with a new toll-center in Joplin, received area code 417, a change that provided more central offices in Kansas City.

7. List of neighborhoods in Chicago - Wikipedia

   en.wikipedia.org/wiki/List_of_neighborhoods_in...

   Ping Tom Memorial Park in Chicago's Chinatown. St. Simeon Mirotočivi, a Serbian Orthodox church located in East Side. Greektown. Fiesta Boricua on Paseo Boricua in Humboldt Park. The Robie House in Hyde Park is a Frank Lloyd Wright design. The Gateway Theatre 's Solidarity Tower in Jefferson Park is a replica of the Royal Castle in Warsaw.