| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | A0PFC | 355 | 27.50 % | | 462 | 25.88 % | | 2 | C C D C C C | KA0PQW | 307 | 23.78 % | | 391 | 21.90 % | | 3 | C D C C | K0EA | 261 | 20.22 % | | 409 | 22.91 % | | 4 | C C D C C | AA0CW | 180 | 13.94 % | | 240 | 13.45 % | | 5 | C C D C | AA0O | 174 | 13.48 % | | 260 | 14.57 % | | 6 | C D C C C / D | K0JFJ/7 | 4 | 0.31 % | | 6 | 0.34 % | | 7 | C D C C C / C | N7NJO/M | 2 | 0.15 % | | 2 | 0.11 % | | 8 | D C D C | 8P5A | 1 | 0.08 % | | 4 | 0.22 % | | 9 | C C D C C / D | KL7AN/6 | 1 | 0.08 % | | 1 | 0.06 % | | 10 | C C D / C D C C | KP4/K7RB | 1 | 0.08 % | | 2 | 0.11 % | | 11 | D C D C C | 4U1WB | 1 | 0.08 % | | 3 | 0.17 % | | 12 | C D C C / C C C | N8YN/QRP | 1 | 0.08 % | | 1 | 0.06 % | | 13 | C C D C / C C | NG5E/MM | 1 | 0.08 % | | 1 | 0.06 % | | 14 | C C D C C / C D | VE3PK/W4 | 1 | 0.08 % | | 1 | 0.06 % | | 15 | C D C | W1N | 1 | 0.08 % | | 2 | 0.11 % | |
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