| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | AU7RJA | 580 | 82.39 % | | 666 | 81.92 % | | 2 | C C D C C | AH6WX | 59 | 8.38 % | | 74 | 9.10 % | | 3 | D C D C C C | 7K1JFM | 19 | 2.70 % | | 22 | 2.71 % | | 4 | C C D C | HA3E | 16 | 2.27 % | | 18 | 2.21 % | | 5 | C C D C C C / D | JA1FIO/1 | 16 | 2.27 % | | 17 | 2.09 % | | 6 | C D C C | K6YA | 5 | 0.71 % | | 5 | 0.62 % | | 7 | C C D D D | BU100 | 3 | 0.43 % | | 4 | 0.49 % | | 8 | D C D C | 8N3B | 2 | 0.28 % | | 3 | 0.37 % | | 9 | D C D C C C / D | 7K1MAG/2 | 1 | 0.14 % | | 1 | 0.12 % | | 10 | C C D C C C / C C C | JA1WLI/QRP | 1 | 0.14 % | | 1 | 0.12 % | | 11 | C D C C C | K6SSS | 1 | 0.14 % | | 1 | 0.12 % | | 12 | C D D C C C | E21YDP | 1 | 0.14 % | | 1 | 0.12 % | |
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