| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K0ANT | 15 | 39.47 % | | 15 | 38.46 % | | | 2 | C D C C | K4JJ | 12 | 31.58 % | | 12 | 30.77 % | | | 3 | C C D C | AA9H | 6 | 15.79 % | | 6 | 15.38 % | | | 4 | C C D C C C | KF0NWC | 2 | 5.26 % | | 2 | 5.13 % | | | 5 | C D C | K7K | 2 | 5.26 % | | 2 | 5.13 % | | | 6 | C C D C C | AE5GT | 1 | 2.63 % | | 1 | 2.56 % | |
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