| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K1UHF | 36 | 39.13 % | | 36 | 38.71 % | | | 2 | C C D C C C | KA0DOS | 20 | 21.74 % | | 20 | 21.51 % | | | 3 | C D C C | K1RH | 18 | 19.57 % | | 18 | 19.35 % | | | 4 | C C D C C | AC9UC | 13 | 14.13 % | | 13 | 13.98 % | | | 5 | C C D C | AA6H | 3 | 3.26 % | | 3 | 3.23 % | | | 6 | C D C | K4M | 2 | 2.17 % | | 2 | 2.15 % | |
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