| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | A8CA | 135 | 25.42 % | | 276 | 27.94 % | | 2 | C D C C C | K0JJR | 114 | 21.47 % | | 207 | 20.95 % | | 3 | C C D C | AA3B | 109 | 20.53 % | | 210 | 21.26 % | | 4 | C C D C C C | KA1PGI | 95 | 17.89 % | | 153 | 15.49 % | | 5 | C C D C C | AA0FO | 74 | 13.94 % | | 136 | 13.77 % | | 6 | C D C C C / C C D | K6DTT/KP4 | 1 | 0.19 % | | 1 | 0.10 % | | 7 | C D C C / D | K2YG/1 | 1 | 0.19 % | | 2 | 0.20 % | | 8 | C C D / C D C C C | KP4/K6DTT | 1 | 0.19 % | | 2 | 0.20 % | | 9 | C D D C | S53M | 1 | 0.19 % | | 1 | 0.10 % | |
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