| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AC9S | 98 | 26.20 % | | 98 | 26.06 % | | 2 | C C D C C | AD4EB | 95 | 25.40 % | | 95 | 25.27 % | | 3 | C C D C C C | BA7JMO | 81 | 21.66 % | | 81 | 21.54 % | | 4 | C D C C | E7DX | 40 | 10.70 % | | 40 | 10.64 % | | 5 | C D C C C | F5NBX | 36 | 9.63 % | | 36 | 9.57 % | | 6 | C D C | D4C | 8 | 2.14 % | | 8 | 2.13 % | | 7 | D C D C C | 4K6FO | 5 | 1.34 % | | 5 | 1.33 % | | 8 | D C D C | 3W9A | 4 | 1.07 % | | 4 | 1.06 % | | 9 | C D D C | P40L | 3 | 0.80 % | | 3 | 0.80 % | | 10 | D C D C C C | 2E0CVN | 2 | 0.53 % | | 2 | 0.53 % | | 11 | C C D C C C / D | JA5EXN/5 | 1 | 0.27 % | | 1 | 0.27 % | | 12 | C D D C C | V51YJ | 1 | 0.27 % | | 1 | 0.27 % | |
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