| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CT2HEX | 241 | 53.32 % | | 271 | 53.03 % | | 2 | C C D C C | BG7KO | 96 | 21.24 % | | 110 | 21.53 % | | 3 | C D C C C | F1ELJ | 55 | 12.17 % | | 60 | 11.74 % | | 4 | C C D C | DF0X | 18 | 3.98 % | | 24 | 4.70 % | | 5 | C D C C | F5TO | 13 | 2.88 % | | 14 | 2.74 % | | 6 | C C D C C C / C C C | HB9DAX/QRP | 5 | 1.11 % | | 5 | 0.98 % | | 7 | D C D C C | 4Z4DX | 4 | 0.88 % | | 6 | 1.17 % | | 8 | C D C C C / C | F4DIA/M | 3 | 0.66 % | | 3 | 0.59 % | | 9 | D C D C C C | 2E0XBT | 3 | 0.66 % | | 3 | 0.59 % | | 10 | C D D C | E77O | 3 | 0.66 % | | 4 | 0.78 % | | 11 | C C D C C / C C C | DL6YA/QRP | 1 | 0.22 % | | 1 | 0.20 % | | 12 | D C D C | 4L8A | 1 | 0.22 % | | 1 | 0.20 % | | 13 | C C D D C C C | DF20DCL | 1 | 0.22 % | | 1 | 0.20 % | | 14 | C D C C C / C C C | G4HOM/QRP | 1 | 0.22 % | | 1 | 0.20 % | | 15 | C C D C C / C | HA5JI/M | 1 | 0.22 % | | 1 | 0.20 % | | 16 | C C D C C C / C | DB8APG/P | 1 | 0.22 % | | 1 | 0.20 % | | 17 | C C D C C C / D | IZ1ZFC/2 | 1 | 0.22 % | | 1 | 0.20 % | | 18 | C C / C C D C C C | ON/DO8PHK | 1 | 0.22 % | | 1 | 0.20 % | | 19 | C D D C C | S52ON | 1 | 0.22 % | | 1 | 0.20 % | | 20 | C D D C C C | S56LKP | 1 | 0.22 % | | 1 | 0.20 % | | 21 | C C / C C D C C | YO/VA3WO | 1 | 0.22 % | | 1 | 0.20 % | |
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