| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | E7DX | 306 | 26.45 % | | 438 | 28.76 % | | 2 | C C D C | AA3K | 278 | 24.03 % | | 375 | 24.62 % | | 3 | C C D C C | AA0AI | 243 | 21.00 % | | 303 | 19.89 % | | 4 | C C D C C C | BD1IIJ | 192 | 16.59 % | | 228 | 14.97 % | | 5 | C D C C C | F8KCF | 102 | 8.82 % | | 133 | 8.73 % | | 6 | D C D C C | 4F3BZ | 10 | 0.86 % | | 11 | 0.72 % | | 7 | D C D C | 4D3X | 6 | 0.52 % | | 12 | 0.79 % | | 8 | C D D C | D73A | 5 | 0.43 % | | 6 | 0.39 % | | 9 | C D C | B4T | 4 | 0.35 % | | 5 | 0.33 % | | 10 | C D D C C | S50XX | 3 | 0.26 % | | 3 | 0.20 % | | 11 | D C D C C C | 4I1EBC | 2 | 0.17 % | | 2 | 0.13 % | | 12 | C C D C C / D | AB5ZA/7 | 1 | 0.09 % | | 1 | 0.07 % | | 13 | C C D C C / C C C | BG5OA/QRP | 1 | 0.09 % | | 1 | 0.07 % | | 14 | D C D D C C C | 4A50CRH | 1 | 0.09 % | | 1 | 0.07 % | | 15 | C D C C / D | K9JF/7 | 1 | 0.09 % | | 2 | 0.13 % | | 16 | C C D C / C | AZ1A/X | 1 | 0.09 % | | 1 | 0.07 % | | 17 | C C D C C C C | VK4FOMP | 1 | 0.09 % | | 1 | 0.07 % | |
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