| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0DDS | 113 | 28.54 % | | 123 | 26.34 % | | 2 | C C D C C C | KA2GQQ | 103 | 26.01 % | | 112 | 23.98 % | | 3 | C D C C | K0AV | 71 | 17.93 % | | 96 | 20.56 % | | 4 | C C D C C | AA4QM | 53 | 13.38 % | | 68 | 14.56 % | | 5 | C C D C | AA3R | 47 | 11.87 % | | 59 | 12.63 % | | 6 | C D C | K0B | 3 | 0.76 % | | 3 | 0.64 % | | 7 | C C D C C C / C | KA2FWC/M | 3 | 0.76 % | | 3 | 0.64 % | | 8 | C D C C C / C | K4ZEE/M | 2 | 0.51 % | | 2 | 0.43 % | | 9 | C D / C C D C C C | W5/VK2ACM | 1 | 0.25 % | | 1 | 0.21 % | |
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