| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K0KWC | 56 | 48.28 % | | 56 | 44.44 % | | | 2 | C C D C C C | KC5DEF | 26 | 22.41 % | | 26 | 20.63 % | | | 3 | C C D C C | AA5KC | 13 | 11.21 % | | 13 | 10.32 % | | | 4 | C D C C | K0FV | 12 | 10.34 % | | 12 | 9.52 % | | | 5 | C C D C | AA5R | 6 | 5.17 % | | 6 | 4.76 % | | | 6 | C D C | K5K | 3 | 2.59 % | | 3 | 2.38 % | |
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