| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | CR3W | 25 | 37.88 % | | 26 | 37.14 % | | 2 | C C D C C | CR3DX | 17 | 25.76 % | | 18 | 25.71 % | | 3 | C D C C | K1KI | 9 | 13.64 % | | 10 | 14.29 % | | 4 | C C D C C C | DL6RDE | 6 | 9.09 % | | 6 | 8.57 % | | 5 | D C D C | 9A5O | 2 | 3.03 % | | 2 | 2.86 % | | 6 | C D C C C | K3CCR | 2 | 3.03 % | | 2 | 2.86 % | | 7 | D C D C C | 4X1MM | 2 | 3.03 % | | 2 | 2.86 % | | 8 | C D C | G8X | 1 | 1.52 % | | 1 | 1.43 % | | 9 | C D D C | P33W | 1 | 1.52 % | | 1 | 1.43 % | | 10 | C C D C C / C | UX1HW/M | 1 | 1.52 % | | 1 | 1.43 % | |
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