| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | ED1K | 22 | 31.43 % | | 31 | 34.07 % | | 2 | C C D C C | CR3DX | 20 | 28.57 % | | 27 | 29.67 % | | 3 | C C D C C C | DL1VDL | 8 | 11.43 % | | 10 | 10.99 % | | 4 | D C D C | 5P5X | 3 | 4.29 % | | 3 | 3.30 % | | 5 | D C D C C | 5P5CW | 2 | 2.86 % | | 2 | 2.20 % | | 6 | C D D C C | S57DX | 2 | 2.86 % | | 2 | 2.20 % | | 7 | D C / C C D C C | 9A/OM8AA | 1 | 1.43 % | | 1 | 1.10 % | | 8 | C C D C / C | DF5A/P | 1 | 1.43 % | | 1 | 1.10 % | | 9 | D C / C D D C C / C | 9A/S51TA/P | 1 | 1.43 % | | 2 | 2.20 % | | 10 | D C D C / C | 9A5D/P | 1 | 1.43 % | | 1 | 1.10 % | | 11 | D C / C C D C C C | 9A/DL3NCI | 1 | 1.43 % | | 1 | 1.10 % | | 12 | C C / C D C C | EI/W5GN | 1 | 1.43 % | | 1 | 1.10 % | | 13 | C D C C C | G4IIY | 1 | 1.43 % | | 1 | 1.10 % | | 14 | C D C | G8X | 1 | 1.43 % | | 1 | 1.10 % | | 15 | C C D C C / C | IQ3ME/P | 1 | 1.43 % | | 1 | 1.10 % | | 16 | C D C C | K3WW | 1 | 1.43 % | | 1 | 1.10 % | | 17 | C C D C C / D | RA1ZZ/3 | 1 | 1.43 % | | 1 | 1.10 % | | 18 | C C D C C C / C | DL0KWH/P | 1 | 1.43 % | | 3 | 3.30 % | | 19 | C D D C | S57X | 1 | 1.43 % | | 1 | 1.10 % | |
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