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In general an amateur radio callsign is of one of these forms where: P – prefix character (letter or numeral, subject to exclusions below). Prefixes can be formed using one-letter, two-letters, a digit and a letter, a letter and a digit, or in rare cases a digit and two letters. There is no ITU allocation of digit-only prefixes.
Ensanche Naco is a sector or neighborhood in the city of Santo Domingo in the Distrito Nacional of the Dominican Republic. This neighborhood is populated in particular by individuals from the upper middle class .
Callbooks have evolved to include on-line databases that are accessible via the Internet to instantly obtain the address of another amateur radio operator and their QSL Managers. The most well known and used on-line QSL databases include QRZ.COM, [ 6 ] IK3QAR, [ 7 ] HamCall, [ 8 ] F6CYV, [ 9 ] DXInfo, [ 10 ] OZ7C [ 11 ] and QSLInfo.
QRZ.com is an amateur radio website listing almost every callsign in the world. In 1992, QRZ founder Fred L. Lloyd accessed data from the FCC database to create a CD-ROM with all call signs issued in the United States. [1] A copy of the CD-ROM is carried on board the International Space Station and one was also aboard the Russian Mir space station.
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).
Note: In the table of allocation, the first two characters of each call sign (whether two letters or one number and one letter, in that order) identify the nationality of the station. In certain instances where the complete alphabetical block is allocated to a single nation, the first letter is sufficient for national identity.
Argentinian broadcast call signs consist of two (or, more recently, three) letters followed by multiple numbers. The second letter, as used in television call signs from the 1960s, traditionally indicated the region; LS call signs were given to stations in Buenos Aires, LT in the northeastern region, LU in the southern region, LV in the central region and LW in the northwestern region.
The code is used to transmit standard messages, sometimes with customized text, very quickly by experienced ARRL National Traffic System (NTS) message traffic handlers. In use, ARRL Numbered Radiograms are messages encoded as one or two numbers. The numbers are always written down as words, and are always preceded by the procedure word "ARL".