| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C | K0AD | 84 | 33.73 % | | 93 | 33.10 % | | | 2 | C D C C C | F4AIF | 50 | 20.08 % | | 51 | 18.15 % | | | 3 | C C D C | AA2U | 44 | 17.67 % | | 51 | 18.15 % | | | 4 | C C D C C | AA0AW | 35 | 14.06 % | | 39 | 13.88 % | | | 5 | C C D C C C | DL3DXX | 35 | 14.06 % | | 38 | 13.52 % | | | 6 | C D C C C / D | N9EVP/0 | 1 | 0.40 % | | 1 | 0.36 % | |
|