| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | E7DX | 390 | 36.18 % | | 398 | 36.18 % | | 2 | C C D C | AA1K | 254 | 23.56 % | | 258 | 23.45 % | | 3 | C C D C C | AA0RS | 163 | 15.12 % | | 168 | 15.27 % | | 4 | C D C C C | F5PLC | 137 | 12.71 % | | 141 | 12.82 % | | 5 | C C D C C C | DL1NKS | 104 | 9.65 % | | 105 | 9.55 % | | 6 | C D C | D4Z | 8 | 0.74 % | | 8 | 0.73 % | | 7 | D C D C | 9A1P | 7 | 0.65 % | | 7 | 0.64 % | | 8 | C D D C | E74R | 7 | 0.65 % | | 7 | 0.64 % | | 9 | C D D C C | S51YI | 4 | 0.37 % | | 4 | 0.36 % | | 10 | D C D C C | 9K2NO | 1 | 0.09 % | | 1 | 0.09 % | | 11 | C C D C C / C D | KH6KG/W5 | 1 | 0.09 % | | 1 | 0.09 % | | 12 | C C D / C C D C | KP4/WI2E | 1 | 0.09 % | | 1 | 0.09 % | | 13 | C C D C C C / D | KB1EFS/2 | 1 | 0.09 % | | 1 | 0.09 % | |
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