| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K1RK | 44 | 43.56 % | | 50 | 44.64 % | | 2 | C D C C C | C6AGU | 31 | 30.69 % | | 32 | 28.57 % | | 3 | C C D C C | AA6FD | 9 | 8.91 % | | 11 | 9.82 % | | 4 | C C D C | AA5B | 8 | 7.92 % | | 9 | 8.04 % | | 5 | C D C | K2R | 6 | 5.94 % | | 7 | 6.25 % | | 6 | C C D C C C | VE2CWI | 2 | 1.98 % | | 2 | 1.79 % | | 7 | C D D C C | C26RS | 1 | 0.99 % | | 1 | 0.89 % | |
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