| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0AD | 71 | 48.97 % | | 165 | 53.57 % | | 2 | C C D C | AA4Q | 37 | 25.52 % | | 80 | 25.97 % | | 3 | C D C C C | K1IMI | 17 | 11.72 % | | 33 | 10.71 % | | 4 | C C D C C | AA4CF | 10 | 6.90 % | | 17 | 5.52 % | | 5 | C C D C C C | DL1NKS | 9 | 6.21 % | | 12 | 3.90 % | | 6 | C D C C / C | N2BA/M | 1 | 0.69 % | | 1 | 0.32 % | |
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