| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C | K2AA | 17 | 30.91 % | | 18 | 30.51 % | | | 2 | C D C C C | K4WOC | 14 | 25.45 % | | 14 | 23.73 % | | | 3 | C C D C C C | KC9DJU | 9 | 16.36 % | | 9 | 15.25 % | | | 4 | C C D C C | AA4RV | 6 | 10.91 % | | 6 | 10.17 % | | | 5 | C D C | K1C | 4 | 7.27 % | | 5 | 8.47 % | | | 6 | C C D C | AA3B | 3 | 5.45 % | | 3 | 5.08 % | | | 7 | C D D C C | K30MT | 1 | 1.82 % | | 1 | 1.69 % | | | 8 | C D C C C D C C C | W2LVK3MJW | 1 | 1.82 % | | 1 | 1.69 % | |
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