| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | DH7RTQ | 86 | 52.76 % | | 96 | 53.33 % | | 2 | C C D C C | DF5BX | 52 | 31.90 % | | 55 | 30.56 % | | 3 | C D C C C | F1RCH | 10 | 6.13 % | | 12 | 6.67 % | | 4 | C C D C | OM4O | 5 | 3.07 % | | 6 | 3.33 % | | 5 | D C D C C | 4Z5KU | 2 | 1.23 % | | 2 | 1.11 % | | 6 | C D C C | R4WT | 2 | 1.23 % | | 2 | 1.11 % | | 7 | D C D C C C | 7N2UQC | 1 | 0.61 % | | 1 | 0.56 % | | 8 | C C D D D D C C | OL2013CM | 1 | 0.61 % | | 1 | 0.56 % | | 9 | C D D C C C | E21YDP | 1 | 0.61 % | | 1 | 0.56 % | | 10 | C C / C C D C C | OZ/DH6MM | 1 | 0.61 % | | 2 | 1.11 % | | 11 | C C D C C / C | HA5KN/P | 1 | 0.61 % | | 1 | 0.56 % | | 12 | C D D C C | S57YK | 1 | 0.61 % | | 1 | 0.56 % | |
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