| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | DL1ZBO | 16 | 29.63 % | | 16 | 28.57 % | | 2 | C D C C C | G4LPD | 12 | 22.22 % | | 13 | 23.21 % | | 3 | C D C C | K0FX | 9 | 16.67 % | | 9 | 16.07 % | | 4 | C C D C C | AA2EQ | 9 | 16.67 % | | 9 | 16.07 % | | 5 | C C D C | AB1J | 5 | 9.26 % | | 6 | 10.71 % | | 6 | D C D C C | 4U1WB | 1 | 1.85 % | | 1 | 1.79 % | | 7 | C C D C C C / D | KA2VLP/3 | 1 | 1.85 % | | 1 | 1.79 % | | 8 | C C D C / D | NE8O/4 | 1 | 1.85 % | | 1 | 1.79 % | |
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