| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K4JJ | 11 | 30.56 % | | 11 | 29.73 % | | 2 | C D C C C | K1EWE | 9 | 25.00 % | | 9 | 24.32 % | | 3 | C C D C C C | KB2EYX | 9 | 25.00 % | | 9 | 24.32 % | | 4 | C C D C C | AA4DD | 3 | 8.33 % | | 3 | 8.11 % | | 5 | C C D C | KZ1O | 3 | 8.33 % | | 3 | 8.11 % | | 6 | C D C | W9I | 1 | 2.78 % | | 1 | 2.70 % | |
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