| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | F5IN | 447 | 39.59 % | | 456 | 39.45 % | | 2 | C C D C | AA1K | 230 | 20.37 % | | 233 | 20.16 % | | 3 | C D C C C | C6AGU | 189 | 16.74 % | | 195 | 16.87 % | | 4 | C C D C C | AA1SB | 144 | 12.75 % | | 150 | 12.98 % | | 5 | C C D C C C | AB3AHK | 106 | 9.39 % | | 109 | 9.43 % | | 6 | C D C | K1A | 3 | 0.27 % | | 3 | 0.26 % | | 7 | C C D / C C D C C C | HB0/HB9LCW | 2 | 0.18 % | | 2 | 0.17 % | | 8 | C D D C C | S53CC | 2 | 0.18 % | | 2 | 0.17 % | | 9 | C D D C | S56X | 2 | 0.18 % | | 2 | 0.17 % | | 10 | C C D C / D | NE8O/4 | 1 | 0.09 % | | 1 | 0.09 % | | 11 | D C D C C | 8S0DX | 1 | 0.09 % | | 1 | 0.09 % | | 12 | C D C C C / D | W3AKD/1 | 1 | 0.09 % | | 1 | 0.09 % | | 13 | C D C C / D | W8KA/6 | 1 | 0.09 % | | 1 | 0.09 % | |
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