| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C | K0AP | 239 | 40.17 % | | 239 | 39.83 % | | | 2 | C C D C | AA0Q | 119 | 20.00 % | | 119 | 19.83 % | | | 3 | C D C C C | K0ALT | 101 | 16.97 % | | 101 | 16.83 % | | | 4 | C C D C C | AA0AI | 71 | 11.93 % | | 71 | 11.83 % | | | 5 | C C D C C C | KA1API | 64 | 10.76 % | | 64 | 10.67 % | | | 6 | C D C C / D | K2ZR/4 | 1 | 0.17 % | | 1 | 0.17 % | |
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