| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0IIT | 64 | 39.51 % | | 65 | 39.63 % | | 2 | C D C C | K2AA | 64 | 39.51 % | | 65 | 39.63 % | | 3 | C C D C | AA3B | 15 | 9.26 % | | 15 | 9.15 % | | 4 | C C D C C | AA6FD | 10 | 6.17 % | | 10 | 6.10 % | | 5 | C D C | K0J | 6 | 3.70 % | | 6 | 3.66 % | | 6 | C C D C C C | KA5HWH | 3 | 1.85 % | | 3 | 1.83 % | |
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