| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K5BTX | 9 | 36.00 % | | 9 | 36.00 % | | | 2 | C D C C | K1QR | 6 | 24.00 % | | 6 | 24.00 % | | | 3 | C C D C C C | KE9GGU | 4 | 16.00 % | | 4 | 16.00 % | | | 4 | C C D C | AK0Z | 3 | 12.00 % | | 3 | 12.00 % | | | 5 | C D C | W6G | 2 | 8.00 % | | 2 | 8.00 % | | | 6 | C C D C C | AB4KA | 1 | 4.00 % | | 1 | 4.00 % | |
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