| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K3MEC | 19 | 37.25 % | | 19 | 37.25 % | | | 2 | C D C C | K1BD | 13 | 25.49 % | | 13 | 25.49 % | | | 3 | C C D C C C | KB0NES | 11 | 21.57 % | | 11 | 21.57 % | | | 4 | C C D C C | KB3MI | 4 | 7.84 % | | 4 | 7.84 % | | | 5 | C C D C | KC8B | 3 | 5.88 % | | 3 | 5.88 % | | | 6 | C D C | K0T | 1 | 1.96 % | | 1 | 1.96 % | |
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