| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | F4SPX | 498 | 32.74 % | | 595 | 33.33 % | | 2 | C D C C | K0AD | 354 | 23.27 % | | 447 | 25.04 % | | 3 | C C D C C C | DL6BBT | 274 | 18.01 % | | 291 | 16.30 % | | 4 | C C D C C | AA1YW | 219 | 14.40 % | | 245 | 13.73 % | | 5 | C C D C | AA3B | 133 | 8.74 % | | 158 | 8.85 % | | 6 | C D C | K1C | 32 | 2.10 % | | 38 | 2.13 % | | 7 | C C D / C C D C C C | EA7/VE3AXC | 1 | 0.07 % | | 1 | 0.06 % | | 8 | C C D C / C D | AK2F/P4 | 1 | 0.07 % | | 1 | 0.06 % | | 9 | D C D C C | 3B8HL | 1 | 0.07 % | | 1 | 0.06 % | | 10 | C D D C C | K40EV | 1 | 0.07 % | | 1 | 0.06 % | | 11 | C C D C C C / D | KB1EFS/2 | 1 | 0.07 % | | 1 | 0.06 % | | 12 | C C D C C C / C | KE0AHM/P | 1 | 0.07 % | | 1 | 0.06 % | | 13 | C D C D C | N3E0R | 1 | 0.07 % | | 1 | 0.06 % | | 14 | C D C C / D | N7DZ/7 | 1 | 0.07 % | | 1 | 0.06 % | | 15 | C C D C C / C D | VE4DS/W0 | 1 | 0.07 % | | 1 | 0.06 % | | 16 | C C D C C C C | VE6DDAY | 1 | 0.07 % | | 1 | 0.06 % | | 17 | C D C C C / D | W7WOW/4 | 1 | 0.07 % | | 1 | 0.06 % | |
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