| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0DIT | 50 | 45.05 % | | 50 | 44.25 % | | 2 | C C D C C C | KB8VOZ | 24 | 21.62 % | | 25 | 22.12 % | | 3 | C D C C | K4RC | 20 | 18.02 % | | 20 | 17.70 % | | 4 | C C D C C | AA0RW | 10 | 9.01 % | | 10 | 8.85 % | | 5 | C C D C | KC0N | 5 | 4.50 % | | 5 | 4.42 % | | 6 | C D D C C C | K04CTF | 1 | 0.90 % | | 1 | 0.88 % | | 7 | C D C | K0T | 1 | 0.90 % | | 2 | 1.77 % | |
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