| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K5CIP | 5 | 35.71 % | | 5 | 35.71 % | | 2 | C D C C | K5FD | 4 | 28.57 % | | 4 | 28.57 % | | 3 | C C D C C C | KI5ZND | 2 | 14.29 % | | 2 | 14.29 % | | 4 | C D C | K7G | 1 | 7.14 % | | 1 | 7.14 % | | 5 | C C D C C | AI4DB | 1 | 7.14 % | | 1 | 7.14 % | | 6 | C C D C | NM6E | 1 | 7.14 % | | 1 | 7.14 % | |
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