| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0DG | 142 | 39.89 % | | 159 | 41.19 % | | 2 | C D C C C | K0LIR | 102 | 28.65 % | | 110 | 28.50 % | | 3 | C C D C | AB5X | 38 | 10.67 % | | 39 | 10.10 % | | 4 | C C D C C | AA4GA | 36 | 10.11 % | | 38 | 9.84 % | | 5 | C C D C C C | KB0SMX | 23 | 6.46 % | | 23 | 5.96 % | | 6 | C D C | K1C | 15 | 4.21 % | | 17 | 4.40 % | |
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