| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0DG | 142 | 39.55 % | | 159 | 40.77 % | | 2 | C D C C C | K0LIR | 103 | 28.69 % | | 112 | 28.72 % | | 3 | C C D C | AA9H | 40 | 11.14 % | | 41 | 10.51 % | | 4 | C C D C C | AA4GA | 36 | 10.03 % | | 38 | 9.74 % | | 5 | C C D C C C | KB0SMX | 23 | 6.41 % | | 23 | 5.90 % | | 6 | C D C | K1C | 15 | 4.18 % | | 17 | 4.36 % | |
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