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  2. Telephone exchange names - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange_names

    Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]

  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. 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 ...

  5. List of PBS member stations - Wikipedia

    en.wikipedia.org/wiki/List_of_PBS_member_stations

    This is a list of member stations of the Public Broadcasting Service, a network of non-commercial educational television stations in the United States. The list is arranged alphabetically by state and based on the station's city of license and followed in parentheses by the designated market area when different from the city of license. There ...

  6. 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.

  7. Telephone directory - Wikipedia

    en.wikipedia.org/wiki/Telephone_directory

    Telephone directory. A telephone directory, commonly called a telephone book, telephone address book, phonebook, or the white and yellow pages, is a listing of telephone subscribers in a geographical area or subscribers to services provided by the organization that publishes the directory. Its purpose is to allow the telephone number of a ...

  8. List of FM radio stations in the United States by call sign ...

    en.wikipedia.org/wiki/List_of_FM_radio_stations...

    This is a list of FM radio stations in the United States having call signs beginning with the letters KD through KF. Low-power FM radio stations, those with designations such as KDDE-LP, have not been included in this list.

  9. List of CBS television affiliates (by U.S. state) - Wikipedia

    en.wikipedia.org/wiki/List_of_CBS_television...

    The station's advertised channel number follows the call letters. In most cases, this is their virtual channel ( PSIP ) number. Stations listed in boldface are owned and operated by CBS through its subsidiary CBS News and Stations (excluding independent stations owned by the group, unless the station simulcasts a co-owned CBS O&O station via a ...