| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K0GOB | 115 | 38.33 % | | 116 | 37.06 % | | | 2 | C D C C | K0GR | 61 | 20.33 % | | 62 | 19.81 % | | | 3 | C C D C C C | CR7BPG | 58 | 19.33 % | | 58 | 18.53 % | | | 4 | C C D C C | AA4EK | 30 | 10.00 % | | 30 | 9.58 % | | | 5 | C C D C | AB3I | 19 | 6.33 % | | 19 | 6.07 % | | | 6 | C D C | K0K | 17 | 5.67 % | | 17 | 5.43 % | |
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