| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | EE7L | 13 | 33.33 % | | 13 | 32.50 % | | 2 | C C D C C | CN2AA | 10 | 25.64 % | | 11 | 27.50 % | | 3 | D C D C | 4L8A | 5 | 12.82 % | | 5 | 12.50 % | | 4 | C D C C | K1KP | 5 | 12.82 % | | 5 | 12.50 % | | 5 | C C D C C C | HG2ITU | 1 | 2.56 % | | 1 | 2.50 % | | 6 | C D C | M9A | 1 | 2.56 % | | 1 | 2.50 % | | 7 | C D D C C | S51CK | 1 | 2.56 % | | 1 | 2.50 % | | 8 | C C / C C D C C | TK/PB8DX | 1 | 2.56 % | | 1 | 2.50 % | | 9 | C D C C C | W3LPL | 1 | 2.56 % | | 1 | 2.50 % | | 10 | C D D C | Z39A | 1 | 2.56 % | | 1 | 2.50 % | |
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