| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CE1UGE | 768 | 28.42 % | | 909 | 27.34 % | | 2 | C C D C C | AA0AI | 696 | 25.76 % | | 847 | 25.47 % | | 3 | C C D C | AA1K | 463 | 17.14 % | | 665 | 20.00 % | | 4 | C D C C C | F1BJD | 344 | 12.73 % | | 382 | 11.49 % | | 5 | C D C C | E7DX | 223 | 8.25 % | | 256 | 7.70 % | | 6 | C D D C C | A61BK | 36 | 1.33 % | | 45 | 1.35 % | | 7 | C D D C | A73A | 31 | 1.15 % | | 46 | 1.38 % | | 8 | C D C | C4A | 29 | 1.07 % | | 40 | 1.20 % | | 9 | D C D C | 2W5B | 25 | 0.93 % | | 38 | 1.14 % | | 10 | D C D C C | 3A2MD | 23 | 0.85 % | | 27 | 0.81 % | | 11 | D C D C C C | 2E0BPU | 16 | 0.59 % | | 16 | 0.48 % | | 12 | C D D C C C | E21YDP | 12 | 0.44 % | | 14 | 0.42 % | | 13 | C D C C C / C | F8IJV/P | 7 | 0.26 % | | 8 | 0.24 % | | 14 | C C D C C C / C | DG3LSM/P | 6 | 0.22 % | | 6 | 0.18 % | | 15 | C C D D C | OG55W | 3 | 0.11 % | | 3 | 0.09 % | | 16 | C C D C C C / D | IK3UNA/1 | 3 | 0.11 % | | 6 | 0.18 % | | 17 | C C D D C C C C | DK65DARC | 2 | 0.07 % | | 2 | 0.06 % | | 18 | C C D C C / C C D | DK5IR/EA6 | 1 | 0.04 % | | 1 | 0.03 % | | 19 | C C D C C / C C C | EA1GT/QRP | 1 | 0.04 % | | 1 | 0.03 % | | 20 | C C D C C D | ED1RF9 | 1 | 0.04 % | | 1 | 0.03 % | | 21 | C C C / C C D C C | DLP/SP2UU | 1 | 0.04 % | | 1 | 0.03 % | | 22 | C C D C / C | DQ5R/P | 1 | 0.04 % | | 1 | 0.03 % | | 23 | C C D C C / D | EW8RU/1 | 1 | 0.04 % | | 1 | 0.03 % | | 24 | C D C C C C | G0ZJHC | 1 | 0.04 % | | 1 | 0.03 % | | 25 | C D / C C D C C | I0/LZ2OG | 1 | 0.04 % | | 1 | 0.03 % | | 26 | C C D C C C C | DK0WRTC | 1 | 0.04 % | | 1 | 0.03 % | | 27 | C C D / C C D C C C | IM0/IK0FMB | 1 | 0.04 % | | 1 | 0.03 % | | 28 | C / C D D C | F/E72T | 1 | 0.04 % | | 1 | 0.03 % | | 29 | C C / C / C C D C C C | OK/P/IK5YOJ | 1 | 0.04 % | | 1 | 0.03 % | | 30 | C C / C C D C C | RA/DL2KQ | 1 | 0.04 % | | 1 | 0.03 % | | 31 | C C D D C C | TM55CD | 1 | 0.04 % | | 1 | 0.03 % | | 32 | C C D C / C C C | YT4T/QRP | 1 | 0.04 % | | 1 | 0.03 % | |
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