| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C | K5CM | 12 | 36.36 % | | 12 | 35.29 % | | | 2 | C D C C C | K8SCH | 8 | 24.24 % | | 8 | 23.53 % | | | 3 | C C D C C | AA5UN | 4 | 12.12 % | | 4 | 11.76 % | | | 4 | C C D C | KB5A | 4 | 12.12 % | | 4 | 11.76 % | | | 5 | C C D C C C | WA2VYA | 3 | 9.09 % | | 3 | 8.82 % | | | 6 | C D C | K4W | 2 | 6.06 % | | 2 | 5.88 % | |
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