| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | A6JV | 389 | 38.33 % | | 567 | 39.90 % | | 2 | C C D C | AA3B | 198 | 19.51 % | | 268 | 18.86 % | | 3 | C D C C C | K0ACP | 175 | 17.24 % | | 234 | 16.47 % | | 4 | C C D C C | AA0AW | 149 | 14.68 % | | 219 | 15.41 % | | 5 | C C D C C C | GW3YDX | 97 | 9.56 % | | 125 | 8.80 % | | 6 | C C D C / D | AI0Y/9 | 2 | 0.20 % | | 2 | 0.14 % | | 7 | C C D D | AI60 | 1 | 0.10 % | | 1 | 0.07 % | | 8 | C D C C / D | K2ZR/4 | 1 | 0.10 % | | 1 | 0.07 % | | 9 | C D C C C / D | K8RGI/4 | 1 | 0.10 % | | 2 | 0.14 % | | 10 | C C D / C D C C | KP4/K7RB | 1 | 0.10 % | | 1 | 0.07 % | | 11 | C C D C C C / D | WA1PGB/6 | 1 | 0.10 % | | 1 | 0.07 % | |
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