| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K1IG | 18 | 40.00 % | | 18 | 40.00 % | | 2 | C D C C C | K4LRG | 9 | 20.00 % | | 9 | 20.00 % | | 3 | C C D C C C | KA0SIX | 7 | 15.56 % | | 7 | 15.56 % | | 4 | C D C | K4J | 4 | 8.89 % | | 4 | 8.89 % | | 5 | C C D C | AA3B | 4 | 8.89 % | | 4 | 8.89 % | | 6 | C C D C C | AK4DI | 3 | 6.67 % | | 3 | 6.67 % | |
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