| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C | K0AD | 55 | 36.91 % | | 55 | 36.42 % | | | 2 | C D C C C | K0PEA | 37 | 24.83 % | | 37 | 24.50 % | | | 3 | C C D C C | AB3CX | 21 | 14.09 % | | 21 | 13.91 % | | | 4 | C C D C | AI6O | 19 | 12.75 % | | 19 | 12.58 % | | | 5 | C C D C C C | KB0IWW | 9 | 6.04 % | | 9 | 5.96 % | | | 6 | C D C | K1C | 7 | 4.70 % | | 7 | 4.64 % | | | 7 | C | N | 1 | 0.67 % | | 1 | 0.66 % | |
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