| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C | K0AD | 108 | 25.90 % | | 132 | 27.33 % | | | 2 | C C D C C C | KA0VNY | 101 | 24.22 % | | 104 | 21.53 % | | | 3 | C D C C C | K0CBV | 91 | 21.82 % | | 98 | 20.29 % | | | 4 | C C D C | AA3B | 60 | 14.39 % | | 82 | 16.98 % | | | 5 | C C D C C | AA0FO | 55 | 13.19 % | | 59 | 12.22 % | | | 6 | D C D C | 8P5A | 1 | 0.24 % | | 3 | 0.62 % | | | 7 | D C D C C | 4U1WB | 1 | 0.24 % | | 1 | 0.21 % | |
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