| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CS7ABP | 20 | 36.36 % | | 21 | 37.50 % | | 2 | C C D C C | AK9TX | 10 | 18.18 % | | 10 | 17.86 % | | 3 | C D C C C | K2DSL | 9 | 16.36 % | | 9 | 16.07 % | | 4 | C D C C | E7DX | 8 | 14.55 % | | 8 | 14.29 % | | 5 | C C D C | IO4T | 7 | 12.73 % | | 7 | 12.50 % | | 6 | C C D / C C D C C | KP2/AA1BU | 1 | 1.82 % | | 1 | 1.79 % | |
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