| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | F5IN | 19 | 42.22 % | | 22 | 45.83 % | | 2 | C D C C C | K5GDX | 15 | 33.33 % | | 15 | 31.25 % | | 3 | C C D C | KK5W | 5 | 11.11 % | | 5 | 10.42 % | | 4 | C C D C C | AB5ER | 4 | 8.89 % | | 4 | 8.33 % | | 5 | C C D C C C | KC7EFP | 1 | 2.22 % | | 1 | 2.08 % | | 6 | C D C | N4N | 1 | 2.22 % | | 1 | 2.08 % | |
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