| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C C D C C C | KA9IKK | 69 | 37.70 % | | 69 | 33.50 % | | | 2 | C D C C C | K0FTR | 58 | 31.69 % | | 58 | 28.16 % | | | 3 | C C D C C | AA5KC | 25 | 13.66 % | | 25 | 12.14 % | | | 4 | C D C C | K0YY | 16 | 8.74 % | | 16 | 7.77 % | | | 5 | C C D C | AC0W | 14 | 7.65 % | | 14 | 6.80 % | | | 6 | C D C | N5T | 1 | 0.55 % | | 1 | 0.49 % | |
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