| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0AD | 88 | 50.00 % | | 190 | 55.56 % | | 2 | C C D C | AA7V | 42 | 23.86 % | | 75 | 21.93 % | | 3 | C C D C C | AA4GA | 22 | 12.50 % | | 34 | 9.94 % | | 4 | C D C C C | K0VBU | 20 | 11.36 % | | 38 | 11.11 % | | 5 | C C D C C C | VE3KTB | 4 | 2.27 % | | 5 | 1.46 % | |
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