| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AO6XK | 129 | 27.22 % | | 129 | 26.93 % | | 2 | C C D C C C | CT1BXT | 127 | 26.79 % | | 129 | 26.93 % | | 3 | C C D C | DA0T | 117 | 24.68 % | | 119 | 24.84 % | | 4 | C D C C C | F1AGR | 37 | 7.81 % | | 37 | 7.72 % | | 5 | C D D C | A73A | 11 | 2.32 % | | 11 | 2.30 % | | 6 | C D C C | E7CW | 9 | 1.90 % | | 9 | 1.88 % | | 7 | C D D C C | E77SH | 8 | 1.69 % | | 8 | 1.67 % | | 8 | D C D C | 3Z1K | 8 | 1.69 % | | 8 | 1.67 % | | 9 | C D C | G3M | 6 | 1.27 % | | 6 | 1.25 % | | 10 | C C D D C C | EO50FF | 4 | 0.84 % | | 4 | 0.84 % | | 11 | D C D C C | 9A1AD | 4 | 0.84 % | | 4 | 0.84 % | | 12 | C C D D C | OZ73A | 3 | 0.63 % | | 4 | 0.84 % | | 13 | C C D D C C C | DL73TXL | 2 | 0.42 % | | 2 | 0.42 % | | 14 | D C D D C | 9A50Y | 2 | 0.42 % | | 2 | 0.42 % | | 15 | D C D C C C | 2E1DFS | 2 | 0.42 % | | 2 | 0.42 % | | 16 | C D D C C C | S57IVC | 2 | 0.42 % | | 2 | 0.42 % | | 17 | C D / C D D C | E7/Z35M | 1 | 0.21 % | | 1 | 0.21 % | | 18 | D C D D C C | 9A10FF | 1 | 0.21 % | | 1 | 0.21 % | | 19 | C C D C C / C C C | YU1LM/QRP | 1 | 0.21 % | | 1 | 0.21 % | |
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