| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K3MEC | 19 | 35.19 % | | 19 | 34.55 % | | 2 | C D C C | K1BD | 13 | 24.07 % | | 13 | 23.64 % | | 3 | C C D C C C | KB0NES | 12 | 22.22 % | | 13 | 23.64 % | | 4 | C C D C C | KB3MI | 6 | 11.11 % | | 6 | 10.91 % | | 5 | C C D C | KC8B | 3 | 5.56 % | | 3 | 5.45 % | | 6 | C D C | K0T | 1 | 1.85 % | | 1 | 1.82 % | |
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