| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0AOM | 99 | 38.82 % | | 108 | 38.71 % | | 2 | C C D C C C | KA0GOA | 48 | 18.82 % | | 50 | 17.92 % | | 3 | C D C C | K4HY | 47 | 18.43 % | | 53 | 19.00 % | | 4 | C C D C C | AA6CV | 29 | 11.37 % | | 33 | 11.83 % | | 5 | C C D C | AD5U | 21 | 8.24 % | | 22 | 7.89 % | | 6 | C D C | K7B | 10 | 3.92 % | | 12 | 4.30 % | | 7 | C C D C C C / C | KC6IKI/M | 1 | 0.39 % | | 1 | 0.36 % | |
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