| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0MPH | 135 | 26.32 % | | 155 | 25.37 % | | 2 | C C D C C C | KA0CSW | 126 | 24.56 % | | 139 | 22.75 % | | 3 | C D C C | K0EA | 104 | 20.27 % | | 134 | 21.93 % | | 4 | C C D C | AA0Z | 71 | 13.84 % | | 93 | 15.22 % | | 5 | C C D C C | AA0CW | 70 | 13.65 % | | 81 | 13.26 % | | 6 | C D C C / C C D | K2NV/VE3 | 1 | 0.19 % | | 1 | 0.16 % | | 7 | C C D C C / D | AI6LY/7 | 1 | 0.19 % | | 1 | 0.16 % | | 8 | C D C C C / C C | K5KTM/AG | 1 | 0.19 % | | 1 | 0.16 % | | 9 | C D C | K2R | 1 | 0.19 % | | 1 | 0.16 % | | 10 | C D C C / D | N3AD/0 | 1 | 0.19 % | | 2 | 0.33 % | | 11 | C D D C C | V31XX | 1 | 0.19 % | | 2 | 0.33 % | | 12 | C D C C C / C C D | W6ABM/VY2 | 1 | 0.19 % | | 1 | 0.16 % | |
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