| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0AJW | 380 | 35.02 % | | 428 | 36.06 % | | 2 | C D C C | K0CD | 221 | 20.37 % | | 243 | 20.47 % | | 3 | C C D C C C | JG1SYK | 205 | 18.89 % | | 214 | 18.03 % | | 4 | C C D C C | AA0CL | 134 | 12.35 % | | 147 | 12.38 % | | 5 | C C D C | AA0U | 105 | 9.68 % | | 110 | 9.27 % | | 6 | C D C | K0B | 31 | 2.86 % | | 36 | 3.03 % | | 7 | C D C C C / C | N7DLV/M | 2 | 0.18 % | | 2 | 0.17 % | | 8 | C D C C / D | K6NR/7 | 1 | 0.09 % | | 1 | 0.08 % | | 9 | C C D C C C / C C C | KC7CCK/QRP | 1 | 0.09 % | | 1 | 0.08 % | | 10 | C C D C C / D | KL7MH/0 | 1 | 0.09 % | | 1 | 0.08 % | | 11 | C D C C C / D | K7IDX/7 | 1 | 0.09 % | | 1 | 0.08 % | | 12 | C C D / C C D C C | VE6/KE5JA | 1 | 0.09 % | | 1 | 0.08 % | | 13 | C D C C / C C D | W9RL/VE3 | 1 | 0.09 % | | 1 | 0.08 % | | 14 | C C D C C C / D | WB6IUK/7 | 1 | 0.09 % | | 1 | 0.08 % | |
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