| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | BD4UOS | 191 | 50.53 % | | 211 | 49.18 % | | 2 | C C D C C | BV2NF | 98 | 25.93 % | | 116 | 27.04 % | | 3 | C D C C C | F1BAY | 37 | 9.79 % | | 41 | 9.56 % | | 4 | C D C C | I0IJ | 15 | 3.97 % | | 17 | 3.96 % | | 5 | C C D C | AE1C | 13 | 3.44 % | | 15 | 3.50 % | | 6 | D C D C C | 4X5MZ | 5 | 1.32 % | | 7 | 1.63 % | | 7 | C C D C C C / C C C | EA1FCL/QRP | 5 | 1.32 % | | 5 | 1.17 % | | 8 | C D D C | E77O | 2 | 0.53 % | | 2 | 0.47 % | | 9 | D C D C C C | 2E1DFI | 2 | 0.53 % | | 2 | 0.47 % | | 10 | C D D C C | S53EO | 2 | 0.53 % | | 2 | 0.47 % | | 11 | D C D C | 3Z8Z | 1 | 0.26 % | | 4 | 0.93 % | | 12 | C C D C C C / C | GM0GMN/P | 1 | 0.26 % | | 1 | 0.23 % | | 13 | C D C C C / C | F6GNP/M | 1 | 0.26 % | | 1 | 0.23 % | | 14 | C C D C C / D | LZ3WY/2 | 1 | 0.26 % | | 1 | 0.23 % | | 15 | C C / C C D C C C | OK/DL9SUD | 1 | 0.26 % | | 1 | 0.23 % | | 16 | C C D C / C C C | PD9W/QRP | 1 | 0.26 % | | 1 | 0.23 % | | 17 | C C D / C C D C C C | EA7/SM4CTI | 1 | 0.26 % | | 1 | 0.23 % | | 18 | C C D C C / C C C | YU1AM/QRP | 1 | 0.26 % | | 1 | 0.23 % | |
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