| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C | N3IS | 7 | 33.33 % | | 7 | 31.82 % | | | 2 | C C D C C C | KE9COV | 5 | 23.81 % | | 5 | 22.73 % | | | 3 | C C D C C | AB5UE | 4 | 19.05 % | | 4 | 18.18 % | | | 4 | C D C C C | N2OEF | 3 | 14.29 % | | 3 | 13.64 % | | | 5 | C C D C | NN8B | 2 | 9.52 % | | 2 | 9.09 % | |
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