| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AB3CX | 60 | 36.36 % | | 60 | 36.14 % | | 2 | C C D C C C | DL0MFL | 40 | 24.24 % | | 40 | 24.10 % | | 3 | C C D C | DP7D | 37 | 22.42 % | | 37 | 22.29 % | | 4 | C D C C C | G3OLB | 9 | 5.45 % | | 9 | 5.42 % | | 5 | C D C C | G3BJ | 8 | 4.85 % | | 8 | 4.82 % | | 6 | C D D C | S52D | 3 | 1.82 % | | 4 | 2.41 % | | 7 | D C D C | 7X7X | 2 | 1.21 % | | 2 | 1.20 % | | 8 | C D C | D4Z | 2 | 1.21 % | | 2 | 1.20 % | | 9 | D C D C C C | 9A3SMS | 1 | 0.61 % | | 1 | 0.60 % | | 10 | C C / C C D C C | EA/KU1CW | 1 | 0.61 % | | 1 | 0.60 % | | 11 | D C D C C | 8S0DX | 1 | 0.61 % | | 1 | 0.60 % | | 12 | C D D C C | S53AR | 1 | 0.61 % | | 1 | 0.60 % | |
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