| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0ACP | 299 | 39.24 % | | 314 | 37.38 % | | 2 | C C D C C C | KA1BZE | 176 | 23.10 % | | 179 | 21.31 % | | 3 | C D C C | K0DG | 142 | 18.64 % | | 157 | 18.69 % | | 4 | C C D C C | AA0PK | 80 | 10.50 % | | 87 | 10.36 % | | 5 | C C D C | AA9L | 43 | 5.64 % | | 46 | 5.48 % | | 6 | C D C | K0M | 21 | 2.76 % | | 23 | 2.74 % | | 7 | C C D C C C / C C D C C KD8GUA/KF8BHR | 1 | 0.13 % | | 1 | 0.12 % | | |
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