| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K5JCN | 15 | 32.61 % | | 15 | 31.25 % | | 2 | C D C C | K0NC | 12 | 26.09 % | | 12 | 25.00 % | | 3 | C C D C C C | KA3UIP | 11 | 23.91 % | | 11 | 22.92 % | | 4 | C C D C | KW9X | 4 | 8.70 % | | 4 | 8.33 % | | 5 | C C D C C | VE6FT | 4 | 8.70 % | | 4 | 8.33 % | |
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