| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0AD | 357 | 40.48 % | | 593 | 42.54 % | | 2 | C C D C | AA3B | 166 | 18.82 % | | 276 | 19.80 % | | 3 | C D C C C | K0GUZ | 157 | 17.80 % | | 229 | 16.43 % | | 4 | C C D C C | AA0AI | 118 | 13.38 % | | 174 | 12.48 % | | 5 | C C D C C C | DL1NKS | 79 | 8.96 % | | 114 | 8.18 % | | 6 | C C D C / D | AI0Y/9 | 1 | 0.11 % | | 3 | 0.22 % | | 7 | C C D C C / D | AB5ZA/7 | 1 | 0.11 % | | 1 | 0.07 % | | 8 | C C D / C D C C | KP4/K3WA | 1 | 0.11 % | | 2 | 0.14 % | | 9 | C D D C C | V47UR | 1 | 0.11 % | | 1 | 0.07 % | | 10 | C D C C / D | W1YY/7 | 1 | 0.11 % | | 1 | 0.07 % | |
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