| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K1RK | 8 | 42.11 % | | 8 | 40.00 % | | 2 | C D C C C | K4QQG | 5 | 26.32 % | | 6 | 30.00 % | | 3 | C C D C C | AA4RV | 4 | 21.05 % | | 4 | 20.00 % | | 4 | C C D C C C | KD5EJG | 1 | 5.26 % | | 1 | 5.00 % | | 5 | C C D C | NX0I | 1 | 5.26 % | | 1 | 5.00 % | |
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