| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | HF5WIM | 118 | 70.24 % | | 138 | 66.99 % | | 2 | C C D C | SN0R | 33 | 19.64 % | | 46 | 22.33 % | | 3 | C C D C C | SP2CA | 15 | 8.93 % | | 18 | 8.74 % | | 4 | D C D C | 3Z0X | 1 | 0.60 % | | 2 | 0.97 % | | 5 | C C D D C C C | SP50ENV | 1 | 0.60 % | | 2 | 0.97 % | |
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