| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | JA7FTR | 12 | 41.38 % | | 12 | 40.00 % | | 2 | C C D C C | BY5CD | 4 | 13.79 % | | 4 | 13.33 % | | 3 | D C D C C | 7Z1HL | 4 | 13.79 % | | 4 | 13.33 % | | 4 | C C D C | UA8A | 4 | 13.79 % | | 5 | 16.67 % | | 5 | C D C C | R0AA | 2 | 6.90 % | | 2 | 6.67 % | | 6 | D C D C | 4K9W | 1 | 3.45 % | | 1 | 3.33 % | | 7 | D C D / C C D C C C | 9M2/JE1SCJ | 1 | 3.45 % | | 1 | 3.33 % | | 8 | C C D C C C / C | RK9AWT/P | 1 | 3.45 % | | 1 | 3.33 % | |
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