| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C | K0FX | 58 | 36.94 % | | 60 | 36.81 % | | | 2 | C D C C C | K0ANT | 49 | 31.21 % | | 50 | 30.67 % | | | 3 | C C D C | AA9Z | 22 | 14.01 % | | 24 | 14.72 % | | | 4 | C C D C C | AA4NC | 13 | 8.28 % | | 13 | 7.98 % | | | 5 | C C D C C C | KA0NES | 9 | 5.73 % | | 9 | 5.52 % | | | 6 | C D C | K7T | 4 | 2.55 % | | 5 | 3.07 % | | | 7 | C D C C C D | K9DIY4 | 1 | 0.64 % | | 1 | 0.61 % | | | 8 | C D C D | W4D0 | 1 | 0.64 % | | 1 | 0.61 % | |
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