| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0AD | 312 | 43.82 % | | 315 | 43.87 % | | 2 | C C D C | AA3B | 136 | 19.10 % | | 137 | 19.08 % | | 3 | C D C C C | K0DEQ | 119 | 16.71 % | | 120 | 16.71 % | | 4 | C C D C C | AA0AW | 81 | 11.38 % | | 81 | 11.28 % | | 5 | C C D C C C | KA0PQW | 61 | 8.57 % | | 62 | 8.64 % | | 6 | C C D C C / D | AB5ZA/7 | 1 | 0.14 % | | 1 | 0.14 % | | 7 | C C D C / C C | AJ1G/Ct | 1 | 0.14 % | | 1 | 0.14 % | | 8 | C D C | W6Q | 1 | 0.14 % | | 1 | 0.14 % | |
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