| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K0ARF | 97 | 36.60 % | | 97 | 35.40 % | | | 2 | C D C C | K0GQ | 67 | 25.28 % | | 67 | 24.45 % | | | 3 | C C D C C C | KA8JIL | 44 | 16.60 % | | 44 | 16.06 % | | | 4 | C C D C C | AA4KH | 28 | 10.57 % | | 28 | 10.22 % | | | 5 | C C D C | AB7Q | 15 | 5.66 % | | 15 | 5.47 % | | | 6 | C D C | K4B | 14 | 5.28 % | | 14 | 5.11 % | |
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