| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C | K0AD | 85 | 33.86 % | | 94 | 32.87 % | | | 2 | C D C C C | F4AIF | 50 | 19.92 % | | 51 | 17.83 % | | | 3 | C C D C | AA2U | 45 | 17.93 % | | 52 | 18.18 % | | | 4 | C C D C C | AA0AW | 35 | 13.94 % | | 39 | 13.64 % | | | 5 | C C D C C C | DL3DXX | 35 | 13.94 % | | 38 | 13.29 % | | | 6 | C D C C C / D | N9EVP/0 | 1 | 0.40 % | | 1 | 0.35 % | |
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