| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | CR6T | 38 | 31.40 % | | 38 | 31.15 % | | 2 | C C D C C | DB2HG | 34 | 28.10 % | | 34 | 27.87 % | | 3 | C C D C C C | DL2HYH | 31 | 25.62 % | | 32 | 26.23 % | | 4 | C D C C C | F8TRT | 3 | 2.48 % | | 3 | 2.46 % | | 5 | C D C | M2E | 3 | 2.48 % | | 3 | 2.46 % | | 6 | C D D C C | E73AA | 2 | 1.65 % | | 2 | 1.64 % | | 7 | C D D C | S54I | 2 | 1.65 % | | 2 | 1.64 % | | 8 | D C D C | 9A4R | 2 | 1.65 % | | 2 | 1.64 % | | 9 | C C D D C | OG60X | 1 | 0.83 % | | 1 | 0.82 % | | 10 | C C D D C C | OL57ZW | 1 | 0.83 % | | 1 | 0.82 % | | 11 | C D C C | R2PU | 1 | 0.83 % | | 1 | 0.82 % | | 12 | C D D C C C | S51CKP | 1 | 0.83 % | | 1 | 0.82 % | | 13 | D C D C C | 3V8SS | 1 | 0.83 % | | 1 | 0.82 % | | 14 | C C D C C / C C C | YU1LM/QRP | 1 | 0.83 % | | 1 | 0.82 % | |
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