| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K5CM | 10 | 35.71 % | | 10 | 35.71 % | | 2 | C D C C C | N1KWF | 7 | 25.00 % | | 7 | 25.00 % | | 3 | C C D C | KB5A | 4 | 14.29 % | | 4 | 14.29 % | | 4 | C C D C C | AA5UN | 3 | 10.71 % | | 3 | 10.71 % | | 5 | C C D C C C | WA2VYA | 3 | 10.71 % | | 3 | 10.71 % | | 6 | C D C | K5M | 1 | 3.57 % | | 1 | 3.57 % | |
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