| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0AV | 108 | 33.86 % | | 108 | 33.75 % | | 2 | C D C C C | K0JJR | 68 | 21.32 % | | 69 | 21.56 % | | 3 | C C D C | AA3B | 55 | 17.24 % | | 55 | 17.19 % | | 4 | C C D C C | AA0AW | 55 | 17.24 % | | 55 | 17.19 % | | 5 | C C D C C C | KA3EHL | 31 | 9.72 % | | 31 | 9.69 % | | 6 | C D C C / D | K0DI/3 | 1 | 0.31 % | | 1 | 0.31 % | | 7 | C C D C / D | AI0Y/9 | 1 | 0.31 % | | 1 | 0.31 % | |
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