| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K1IG | 17 | 30.91 % | | 18 | 31.58 % | | 2 | C D C C C | K1DTC | 14 | 25.45 % | | 14 | 24.56 % | | 3 | C C D C C C | KB2EYX | 12 | 21.82 % | | 12 | 21.05 % | | 4 | C C D C C | AA4DD | 6 | 10.91 % | | 6 | 10.53 % | | 5 | C C D C | AF2A | 5 | 9.09 % | | 5 | 8.77 % | | 6 | C D C | W9I | 1 | 1.82 % | | 1 | 1.75 % | |
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