| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | SP1AEN | 49 | 71.01 % | | 50 | 68.49 % | | 2 | C C D C | HF3T | 13 | 18.84 % | | 16 | 21.92 % | | 3 | C C D C C | SP1NY | 5 | 7.25 % | | 5 | 6.85 % | | 4 | D C D C | 3Z1K | 1 | 1.45 % | | 1 | 1.37 % | | 5 | C C D C C C / C C C | SP6EIY/QRP | 1 | 1.45 % | | 1 | 1.37 % | |
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