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  2. List of Illinois area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Illinois_area_codes

    Shortly after in 1996, area code 773 was created for the residential parts of the city of Chicago, while downtown kept area code 312. Area code 847 exhausted its numbers quickly, so that an overlay area code, 224, was implemented in 1996 for relief. However, mandatory ten-digit dialing was not in effect until 2002. In March 2007, an overlay ...

  3. Area code 872 - Wikipedia

    en.wikipedia.org/wiki/Area_code_872

    Area code 872 is a telephone area code in the North American Numbering Plan for Chicago in the U.S. state of Illinois. It is an overlay code for a numbering plan area that comprises those of area codes 312 and 773. The overlay commenced service on November 7, 2009. [1]

  4. Open Data Protocol - Wikipedia

    en.wikipedia.org/wiki/Open_Data_Protocol

    In OData protocol version 4.0, JSON format is the standard for representing data, with the Atom format still being in committee specification stage. For representing the data model, the Common Schema Definition Language (CSDL) is used, which defines an XML representation of the entity data model exposed by OData services.

  5. 10 most expensive ZIP codes in the Chicago area - AOL

    www.aol.com/10-most-expensive-zip-codes...

    As of September 2023, the average value of a single-family home in the Chicago area was just over $370,000 — about $20,000 above the U.S. average. But in parts of the area, home prices soar far ...

  6. List of neighborhoods in Chicago - Wikipedia

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

    There are 178 official neighborhoods in Chicago. [1] Neighborhood names and identities have evolved due to real estate development and changing demographics. [2] Chicago is also divided into 77 community areas which were drawn by University of Chicago researchers in the late 1920s. [3]

  7. Community areas in Chicago - Wikipedia

    en.wikipedia.org/wiki/Community_areas_in_Chicago

    A map of the 77 community areas, broken down by purported regions. While the areas have official use and definition, the color groupings are unofficial, and such "regions" may be defined differently, grouped differently, or not be used at all. The city of Chicago is divided into 77 community areas for statistical and planning purposes.

  8. Chicago Loop - Wikipedia

    en.wikipedia.org/wiki/Chicago_Loop

    The Loop is Chicago's central business district and one of the city's 77 municipally recognized community areas.Located at the center of downtown Chicago [3] on the shores of Lake Michigan, it is the second-largest business district in North America after Midtown Manhattan.

  9. Area code 773 - Wikipedia

    en.wikipedia.org/wiki/Area_code_773

    The new area code went into effect on October 12, 1996. Permissive dialing of 312 continued across Chicago until January 11, 1997. [1] [2] On August 10, 2007, the Illinois Commerce Commission announced that area code 872 would overlay area codes 312 and 773; it went into service on November 7, 2009.