| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | IZ4AMS | 129 | 42.57 % | | 160 | 43.96 % | | 2 | C C D C C | AA1SU | 81 | 26.73 % | | 102 | 28.02 % | | 3 | C D C C C | F1AKK | 40 | 13.20 % | | 42 | 11.54 % | | 4 | C D C C | K0OE | 32 | 10.56 % | | 33 | 9.07 % | | 5 | C C D C | AE1T | 20 | 6.60 % | | 26 | 7.14 % | | 6 | C D C C C / D | N0HYL/8 | 1 | 0.33 % | | 1 | 0.27 % | |
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