| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | DB3AS | 182 | 43.44 % | | 189 | 43.95 % | | 2 | C C D C C C | CT1HIX | 102 | 24.34 % | | 103 | 23.95 % | | 3 | C C D C | CR2X | 82 | 19.57 % | | 85 | 19.77 % | | 4 | C D D C | E74O | 13 | 3.10 % | | 13 | 3.02 % | | 5 | C D C C C | F5BBD | 13 | 3.10 % | | 13 | 3.02 % | | 6 | C D C C | I2IJ | 7 | 1.67 % | | 7 | 1.63 % | | 7 | C D D C C | S51RE | 6 | 1.43 % | | 6 | 1.40 % | | 8 | D C D C | 4L2M | 4 | 0.95 % | | 4 | 0.93 % | | 9 | D C D C C | 9A1MM | 3 | 0.72 % | | 3 | 0.70 % | | 10 | C C D C C / C | DO8CW/P | 1 | 0.24 % | | 1 | 0.23 % | | 11 | C D D C C C | E73ESP | 1 | 0.24 % | | 1 | 0.23 % | | 12 | C C D C C / C C D | KW7MM/VY2 | 1 | 0.24 % | | 1 | 0.23 % | | 13 | C D C | G3R | 1 | 0.24 % | | 1 | 0.23 % | | 14 | C C / C C D C C C | OZ/KH6DXX | 1 | 0.24 % | | 1 | 0.23 % | | 15 | C C D D C C | OZ30EU | 1 | 0.24 % | | 1 | 0.23 % | | 16 | C C D D C | LY98O | 1 | 0.24 % | | 1 | 0.23 % | |
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