| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | E7DX | 336 | 36.68 % | | 340 | 36.64 % | | 2 | C C D C | AA1K | 202 | 22.05 % | | 203 | 21.88 % | | 3 | C C D C C | AA0RS | 140 | 15.28 % | | 141 | 15.19 % | | 4 | C D C C C | C6AGU | 125 | 13.65 % | | 130 | 14.01 % | | 5 | C C D C C C | CT9ABO | 82 | 8.95 % | | 82 | 8.84 % | | 6 | C D D C | J42L | 13 | 1.42 % | | 13 | 1.40 % | | 7 | D C D C | 4X2M | 4 | 0.44 % | | 5 | 0.54 % | | 8 | C D C | D4C | 4 | 0.44 % | | 4 | 0.43 % | | 9 | C D D C C | P40AA | 3 | 0.33 % | | 3 | 0.32 % | | 10 | D C D C C | 4U1WB | 2 | 0.22 % | | 2 | 0.22 % | | 11 | C C D / C C D C C | EA8/EA4BQ | 1 | 0.11 % | | 1 | 0.11 % | | 12 | D C D C C C | 9A1LAF | 1 | 0.11 % | | 1 | 0.11 % | | 13 | C C D C C / D | KH6KG/5 | 1 | 0.11 % | | 1 | 0.11 % | | 14 | C C D C / C D | KH7X/W7 | 1 | 0.11 % | | 1 | 0.11 % | | 15 | C C D C C C / D | KB1EFS/2 | 1 | 0.11 % | | 1 | 0.11 % | |
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