| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | EA3C | 75 | 26.79 % | | 82 | 28.08 % | | 2 | C C D C C | DD7NT | 74 | 26.43 % | | 75 | 25.68 % | | 3 | C C D C C C | DB1BAN | 67 | 23.93 % | | 67 | 22.95 % | | 4 | C D C C | E7DX | 22 | 7.86 % | | 22 | 7.53 % | | 5 | C D C C C | G3XTT | 12 | 4.29 % | | 12 | 4.11 % | | 6 | C D C | D4Z | 8 | 2.86 % | | 9 | 3.08 % | | 7 | C D D C C | E73AA | 7 | 2.50 % | | 7 | 2.40 % | | 8 | C D D C | J42L | 7 | 2.50 % | | 7 | 2.40 % | | 9 | D C D C C | 4X6FR | 4 | 1.43 % | | 4 | 1.37 % | | 10 | D C D C | 4O3A | 3 | 1.07 % | | 3 | 1.03 % | | 11 | C C D C / D C | TA1C/2K | 1 | 0.36 % | | 1 | 0.34 % | |
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