| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0AD | 212 | 42.57 % | | 326 | 44.60 % | | 2 | C C D C | AA3B | 90 | 18.07 % | | 131 | 17.92 % | | 3 | C D C C C | K0ARS | 79 | 15.86 % | | 98 | 13.41 % | | 4 | C C D C C | AA0AW | 72 | 14.46 % | | 113 | 15.46 % | | 5 | C C D C C C | JH1GEX | 36 | 7.23 % | | 49 | 6.70 % | | 6 | C D C | K5O | 2 | 0.40 % | | 4 | 0.55 % | | 7 | C D C C / D | N4DL/0 | 2 | 0.40 % | | 2 | 0.27 % | | 8 | C C D C / D | AI0Y/9 | 1 | 0.20 % | | 1 | 0.14 % | | 9 | C C D C C / D | AB5ZA/7 | 1 | 0.20 % | | 1 | 0.14 % | | 10 | D C D C | 8P5A | 1 | 0.20 % | | 3 | 0.41 % | | 11 | C D C C / C | N0AC/M | 1 | 0.20 % | | 1 | 0.14 % | | 12 | C C D / C D C C | KH6/N7ON | 1 | 0.20 % | | 2 | 0.27 % | |
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