| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | DL2A | 32 | 27.59 % | | 37 | 28.24 % | | 2 | C C D C C | DF5EG | 31 | 26.72 % | | 36 | 27.48 % | | 3 | C C D C C C | DL2ZBO | 26 | 22.41 % | | 28 | 21.37 % | | 4 | C D C C C | F4VSQ | 9 | 7.76 % | | 12 | 9.16 % | | 5 | C D D C | E74X | 4 | 3.45 % | | 4 | 3.05 % | | 6 | C D C C | F5IN | 4 | 3.45 % | | 4 | 3.05 % | | 7 | C D D C C | S52WD | 4 | 3.45 % | | 4 | 3.05 % | | 8 | D C D C C | 4X6FR | 3 | 2.59 % | | 3 | 2.29 % | | 9 | C D C | M8A | 2 | 1.72 % | | 2 | 1.53 % | | 10 | C D C C C / D | I2WIJ/1 | 1 | 0.86 % | | 1 | 0.76 % | |
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