| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA1SU | 227 | 31.66 % | | 231 | 31.56 % | | 2 | C C D C | AA3B | 226 | 31.52 % | | 233 | 31.83 % | | 3 | C C D C C C | DF1LON | 136 | 18.97 % | | 140 | 19.13 % | | 4 | C D D C | E72U | 25 | 3.49 % | | 25 | 3.42 % | | 5 | C D C C C | F4DSK | 18 | 2.51 % | | 18 | 2.46 % | | 6 | C D C C | E7CW | 15 | 2.09 % | | 15 | 2.05 % | | 7 | C D C | G4R | 15 | 2.09 % | | 15 | 2.05 % | | 8 | D C D C C | 4K6FO | 11 | 1.53 % | | 11 | 1.50 % | | 9 | C D D C C | E74UK | 9 | 1.26 % | | 9 | 1.23 % | | 10 | D C D C | 3Z0X | 8 | 1.12 % | | 8 | 1.09 % | | 11 | C C D D C C C | DF13MUC | 7 | 0.98 % | | 7 | 0.96 % | | 12 | C C D D C | LZ11C | 5 | 0.70 % | | 5 | 0.68 % | | 13 | C C / C C D C | DL/PG6F | 2 | 0.28 % | | 2 | 0.27 % | | 14 | C C D D C C C C | DL70AFUG | 2 | 0.28 % | | 2 | 0.27 % | | 15 | C C D D C C | HA01FF | 2 | 0.28 % | | 2 | 0.27 % | | 16 | C C D C C C / C C C | HB9FBG/QRP | 1 | 0.14 % | | 1 | 0.14 % | | 17 | C C D D D C | LM450C | 1 | 0.14 % | | 1 | 0.14 % | | 18 | C C D D D C C C | LY800SMG | 1 | 0.14 % | | 1 | 0.14 % | | 19 | C C D C C C / C | DL7USW/P | 1 | 0.14 % | | 1 | 0.14 % | | 20 | C C / C C D C C | OZ/DJ5LA | 1 | 0.14 % | | 1 | 0.14 % | | 21 | C D / C D C C C | S5/G4BJM | 1 | 0.14 % | | 1 | 0.14 % | | 22 | C D D C C C | S59ABC | 1 | 0.14 % | | 1 | 0.14 % | | 23 | C C D C C / C C | UA6GO/MM | 1 | 0.14 % | | 1 | 0.14 % | | 24 | C C D C C / C C C | YU1LM/QRP | 1 | 0.14 % | | 1 | 0.14 % | |
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