| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | DH1NSP | 42 | 32.81 % | | 42 | 32.31 % | | 2 | C C D C C | DB4MB | 38 | 29.69 % | | 38 | 29.23 % | | 3 | C D C C C | F4AYI | 17 | 13.28 % | | 17 | 13.08 % | | 4 | C C D C | EA5D | 8 | 6.25 % | | 9 | 6.92 % | | 5 | C D C C | N2BJ | 6 | 4.69 % | | 6 | 4.62 % | | 6 | D C D C C | 4X6HU | 4 | 3.13 % | | 4 | 3.08 % | | 7 | C D D C C | A45XR | 2 | 1.56 % | | 3 | 2.31 % | | 8 | D C D C C C | 7X3WPL | 2 | 1.56 % | | 2 | 1.54 % | | 9 | D C D D C C C | 5B60ALX | 2 | 1.56 % | | 2 | 1.54 % | | 10 | D C D C C / C C | 4S7JL/MM | 1 | 0.78 % | | 1 | 0.77 % | | 11 | C C D C C C / C | IU0FBK/P | 1 | 0.78 % | | 1 | 0.77 % | | 12 | C C D C C C / C C D | IW4EBS/ID9 | 1 | 0.78 % | | 1 | 0.77 % | | 13 | C C D D C C C C | DF70DARC | 1 | 0.78 % | | 1 | 0.77 % | | 14 | C C D C C / C | OK1UM/P | 1 | 0.78 % | | 1 | 0.77 % | | 15 | C C D D D D C C | SO1920PS | 1 | 0.78 % | | 1 | 0.77 % | | 16 | C C D D C C | TM76DP | 1 | 0.78 % | | 1 | 0.77 % | |
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