| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K0ANT | 53 | 37.06 % | | 53 | 35.57 % | | | 2 | C D C C | K0II | 50 | 34.97 % | | 50 | 33.56 % | | | 3 | C C D C | AA9H | 16 | 11.19 % | | 16 | 10.74 % | | | 4 | C C D C C | AB9YC | 11 | 7.69 % | | 11 | 7.38 % | | | 5 | C D C | K4M | 7 | 4.90 % | | 7 | 4.70 % | | | 6 | C C D C C C | KF0NWC | 6 | 4.20 % | | 6 | 4.03 % | |
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