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these have the same precautions as 1×2 call signs to prevent confusion with 2×2 format; PPNSS, 2×2 call sign these have the same precautions as 2×1 call signs to prevent confusion with 1×3 format; confusion might seem to arise with letter-digit-digit-digit-letter call signs, however in that case the second digit would be the numeral separator.
Generally the shorter the call (up to a 1x2 or 2x1 format) the higher the grade of license, but amateurs who upgrade are not required to change their call signs. In any case some of the available blocks have been used up. The 1x1 call signs, such as K6O, are for short-term special event stations.
Examples of pre-1920 stations include 8XK in Pittsburgh, Pennsylvania, which became KDKA in November 1920, and Charles Herrold's series of identifiers from 1909 in San Jose, California: first "This is the Herrold Station" or "San Jose calling", [3] then the call signs FN, SJN, 6XF, and 6XE, then, with the advent of modern call signs, KQW in ...
Amateur call signs, titles, QCWA or OOTC numbers, etc., in the signature follow the name on the same line. Addresses for the signing party are optionally included (upon request) on subsequent lines, exactly as done in the address section, but are included only if important to the originator, message purpose, or replying.
Radio call signs are a globally unique identifier assigned to all stations that are required to obtain a license in order to emit RF energy. The identifiers consist of from 3 to 9 letters and digits, and while the basic format of the call signs are specified by the ITU-R Radio Regulations, Article 19, Identification of stations, [5] the details are left up to each country's radio licensing ...
The Canadian Forces Affiliate Radio System was established in 1978. The programme enlists amateur radio volunteer operators and equipment but uses neither standard radioamateur frequencies nor callsigns as CFARS is allocated its own specific official frequencies and identifiers.
FCC amateur radio station license of Al Gross. In the United States, amateur radio licensing is governed by the Federal Communications Commission (FCC). Licenses to operate amateur stations for personal use are granted to individuals of any age once they demonstrate an understanding of both pertinent FCC regulations and knowledge of radio station operation and safety considerations.
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).