| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | CQ3W | 64 | 41.83 % | | 77 | 45.29 % | | 2 | C C D C C | DF9XV | 33 | 21.57 % | | 34 | 20.00 % | | 3 | C C D C C C | CT2HKN | 26 | 16.99 % | | 28 | 16.47 % | | 4 | C D C C C | F4EMI | 16 | 10.46 % | | 16 | 9.41 % | | 5 | C D C C | K1DG | 5 | 3.27 % | | 5 | 2.94 % | | 6 | C D C | G6T | 4 | 2.61 % | | 5 | 2.94 % | | 7 | D C D C | 4O4T | 2 | 1.31 % | | 2 | 1.18 % | | 8 | C D D C | G61C | 1 | 0.65 % | | 1 | 0.59 % | | 9 | D C D C C | 3V9SS | 1 | 0.65 % | | 1 | 0.59 % | | 10 | D C C C | 3VSS | 1 | 0.65 % | | 1 | 0.59 % | |
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