| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | GW0TAU | 48 | 34.78 % | | 51 | 34.69 % | | 2 | C D C C C | F6DQV | 34 | 24.64 % | | 35 | 23.81 % | | 3 | C C D C C | AA4TI | 24 | 17.39 % | | 27 | 18.37 % | | 4 | C D C C | K0FX | 19 | 13.77 % | | 21 | 14.29 % | | 5 | C C D C | AA3R | 13 | 9.42 % | | 13 | 8.84 % | |
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