| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | D3NA | 60 | 26.55 % | | 67 | 27.69 % | | 2 | C D C C C | K0BMC | 56 | 24.78 % | | 59 | 24.38 % | | 3 | C C D C C C | KA7RAG | 44 | 19.47 % | | 48 | 19.83 % | | 4 | C C D C | AC0W | 36 | 15.93 % | | 37 | 15.29 % | | 5 | C C D C C | AA0AI | 29 | 12.83 % | | 30 | 12.40 % | | 6 | C C D C C / D | AB5ZA/7 | 1 | 0.44 % | | 1 | 0.41 % | |
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