| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0DVH | 7 | 26.92 % | | 7 | 26.92 % | | 2 | C D C C | K0SI | 6 | 23.08 % | | 6 | 23.08 % | | 3 | C C D C | KC0M | 4 | 15.38 % | | 4 | 15.38 % | | 4 | C C D C C C | KC0UYN | 4 | 15.38 % | | 4 | 15.38 % | | 5 | C C D C C | AA5RN | 2 | 7.69 % | | 2 | 7.69 % | | 6 | C D C | K9O | 2 | 7.69 % | | 2 | 7.69 % | | 7 | C C D C C / D | WW2OK/5 | 1 | 3.85 % | | 1 | 3.85 % | |
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