They are regulated internationally by the ITU as well as nationally by the Federal Telecommunications Institute, which regulates broadcast stations, wireless telecommunications and spectrum use. Rarely, amateur call signs end in digits. This article needs additional citations for verification. A call sign can be any number of letters and numerals but each country must only use call signs that begin with the characters allocated for use in that country. Any country or ITU prefix assignment can have many entities within it. Language usage Title page of the Chr Call signs in Antarctica topic Call signs in Antarctica include a three letter region code and a series of numbers and letters.
The FCC in the U.
Member feedback about Amateur radio frequency allocations: Russia traditionally assigns code names as call signs to individual cosmonauts, more in the manner of aviator call signs, rather than to the spacecraft. The PARS operates a QSL bureau for those amateur radio operators in regular contact with amateur radio operators in other countries, and supports amateur radio operating awards and radio contests. The second letter, as used in television call signs from the s, traditionally indicated the region; LS call signs were given to stations in Buenos Aires, LT in the north Prefixes are assigned internationally, and a separating numeral plus suffix are added by a national body to produce this unique identifier.