| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | DF3SM | 99 | 31.63 % | | 119 | 31.23 % | | 2 | C C D C C C | DF1GRA | 89 | 28.43 % | | 104 | 27.30 % | | 3 | C C D C | AA3B | 61 | 19.49 % | | 82 | 21.52 % | | 4 | C D C C C | F4HMX | 22 | 7.03 % | | 26 | 6.82 % | | 5 | C D C C | F5IN | 20 | 6.39 % | | 24 | 6.30 % | | 6 | C D D C | E74X | 7 | 2.24 % | | 8 | 2.10 % | | 7 | C D D C C | E77EA | 5 | 1.60 % | | 5 | 1.31 % | | 8 | C C D D D C | SN100L | 3 | 0.96 % | | 4 | 1.05 % | | 9 | D C D C C | 9A1AA | 2 | 0.64 % | | 2 | 0.52 % | | 10 | D C D C C C | 9A1CFR | 1 | 0.32 % | | 3 | 0.79 % | | 11 | D C D D D C | 3Z100I | 1 | 0.32 % | | 1 | 0.26 % | | 12 | C C D D D C C | SN100RD | 1 | 0.32 % | | 1 | 0.26 % | | 13 | C C D C C C / C | US7IGN/P | 1 | 0.32 % | | 1 | 0.26 % | | 14 | C D C C / D | W9OA/9 | 1 | 0.32 % | | 1 | 0.26 % | |
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