| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K2DAG | 41 | 34.75 % | | 41 | 33.61 % | | | 2 | C C D C C C | KA0DOS | 34 | 28.81 % | | 34 | 27.87 % | | | 3 | C D C C | K3QY | 20 | 16.95 % | | 20 | 16.39 % | | | 4 | C C D C C | AA0RW | 12 | 10.17 % | | 12 | 9.84 % | | | 5 | C C D C | AA6H | 5 | 4.24 % | | 5 | 4.10 % | | | 6 | C D C | K4M | 5 | 4.24 % | | 5 | 4.10 % | | | 7 | C D C C C C C | W4CRVTN | 1 | 0.85 % | | 1 | 0.82 % | |
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