| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C | K0EU | 25 | 46.30 % | | 25 | 46.30 % | | | 2 | C D C C C | K6WSC | 12 | 22.22 % | | 12 | 22.22 % | | | 3 | C C D C | AJ4A | 7 | 12.96 % | | 7 | 12.96 % | | | 4 | C C D C C | AA2BJ | 4 | 7.41 % | | 4 | 7.41 % | | | 5 | C D C | K1B | 3 | 5.56 % | | 3 | 5.56 % | | | 6 | C C D C C C | WA4AUG | 3 | 5.56 % | | 3 | 5.56 % | |
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