| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | IK0CHU | 46 | 73.02 % | | 56 | 73.68 % | | 2 | C D C C C | I0AMS | 8 | 12.70 % | | 8 | 10.53 % | | 3 | C C D C C | IQ1LA | 2 | 3.17 % | | 2 | 2.63 % | | 4 | C C D C C C / D | IK4QJF/4 | 2 | 3.17 % | | 4 | 5.26 % | | 5 | C D D C C | S57JJ | 2 | 3.17 % | | 2 | 2.63 % | | 6 | C C D C C / D | IQ4FJ/4 | 1 | 1.59 % | | 2 | 2.63 % | | 7 | C D D C | S51S | 1 | 1.59 % | | 1 | 1.32 % | | 8 | C D C C C / C C D | I1WKN/IX1 | 1 | 1.59 % | | 1 | 1.32 % | |
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