| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0AMC | 47 | 43.93 % | | 48 | 44.44 % | | 2 | C C D C C C | KB8TPT | 17 | 15.89 % | | 17 | 15.74 % | | 3 | C D C C | K2NJ | 16 | 14.95 % | | 16 | 14.81 % | | 4 | C C D C C | AA5KC | 14 | 13.08 % | | 14 | 12.96 % | | 5 | C C D C | KA4J | 11 | 10.28 % | | 11 | 10.19 % | | 6 | C D C | K5W | 2 | 1.87 % | | 2 | 1.85 % | |
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