| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | DF0SX | 44 | 42.31 % | | 44 | 41.51 % | | 2 | C C D C | AA3B | 30 | 28.85 % | | 32 | 30.19 % | | 3 | C C D C C C | DL1EAL | 15 | 14.42 % | | 15 | 14.15 % | | 4 | C D C C | K1ZZ | 4 | 3.85 % | | 4 | 3.77 % | | 5 | C D D C | S51W | 3 | 2.88 % | | 3 | 2.83 % | | 6 | C D C C C | F4VSQ | 2 | 1.92 % | | 2 | 1.89 % | | 7 | D C D C C | 9A1AA | 2 | 1.92 % | | 2 | 1.89 % | | 8 | D C D C | 9A2X | 1 | 0.96 % | | 1 | 0.94 % | | 9 | C D D C C C | E73ESP | 1 | 0.96 % | | 1 | 0.94 % | | 10 | C C D D D D C C C | DQ1200ASP | 1 | 0.96 % | | 1 | 0.94 % | | 11 | C D D C C | S52AW | 1 | 0.96 % | | 1 | 0.94 % | |
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