| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K2LLC | 8 | 29.63 % | | 8 | 29.63 % | | 2 | C C D C C C | KC2ULV | 8 | 29.63 % | | 8 | 29.63 % | | 3 | C D C C | K0RC | 6 | 22.22 % | | 6 | 22.22 % | | 4 | C C D C C | AF4AY | 3 | 11.11 % | | 3 | 11.11 % | | 5 | C C D C | NS7U | 2 | 7.41 % | | 2 | 7.41 % | |
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