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Call sign information for U.S. stations are set out in chapter I of the FCC rules, Title 47 (Telecommunication) of the Code of Federal Regulations (C.F.R.): 47 CFR 2.302: General overview of call sign assignments, including a detailed summary of standards and practices for various license classes.
In the United States, all radio and television broadcasting stations that are licensed by the Federal Communications Commission (FCC) are assigned official, distinct call signs. Organized broadcasting began in the U.S. in the early 1920s on the AM band — FM and television did not exist yet.
In South America call signs have been a traditional way of identifying radio and TV stations. Some stations still broadcast their call signs a few times a day, but this practice is becoming very rare. Argentinian broadcast call signs consist of two or three letters followed by multiple numbers, the second and third letters indicating region.
Russian nuclear icebreaker Arktika with call sign UKTY. Merchant and naval vessels are assigned call signs by their national licensing authorities. In the case of states such as Liberia or Panama, which are flags of convenience for ship registration, call signs for larger vessels consist of the national prefix plus three letters (for example, 3LXY, and sometimes followed by a number, e.g. 3LXY2).
Review of the 88 Expanded Band authorizations made by the Federal Communications Commission on March 17, 1997. [5] In the table below: For the "Original Standard Band Assignment" entries, the FCC's March 17, 1997 notification listed station's call signs and frequencies as of June 30, 1993, dating to when the stations initially notified the commission that they were interested in participating.
In addition, when applicable, include a complete call sign history. (For stations in the United States, the FCC database can help provide call sign history for as far back as about 1980, while the History Cards linked from the database can provide call sign and all other history back to a station's beginning.)
Call sign Country Comments FRX Fort Aero: FORT AERO ... FCC First Cambodia Airlines: FIRST CAMBODIA ... Airline Designator / Code Database Search Archived 2005-10-01 ...
An official call sign can often be found by searching the database of the relevant broadcast regulator (for instance, the FCC Licensing and Management System in the United States) or a relevant mirror database such as those aggregated at fccdata.org. Be aware that many periodicals and even stations themselves do not always use correct call ...