| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | DG5SFW | 97 | 35.14 % | | 137 | 32.39 % | | 2 | C C D C C | AI4WW | 69 | 25.00 % | | 112 | 26.48 % | | 3 | C C D C | EA3Y | 39 | 14.13 % | | 67 | 15.84 % | | 4 | C D C C C | F4CIB | 31 | 11.23 % | | 41 | 9.69 % | | 5 | C D C C | F5QJ | 20 | 7.25 % | | 32 | 7.57 % | | 6 | C C D C C / C C C | LZ3GW/QRP | 2 | 0.72 % | | 3 | 0.71 % | | 7 | D C D C C C | 2E0YAO | 2 | 0.72 % | | 2 | 0.47 % | | 8 | C D D C C | E73AA | 2 | 0.72 % | | 2 | 0.47 % | | 9 | C C D C C C / C C C | SP4LVK/QRP | 2 | 0.72 % | | 5 | 1.18 % | | 10 | C D C | G1P | 2 | 0.72 % | | 5 | 1.18 % | | 11 | D C D C | 9A7B | 1 | 0.36 % | | 2 | 0.47 % | | 12 | C C D D C | OZ11A | 1 | 0.36 % | | 1 | 0.24 % | | 13 | D C D C C | 9A5CC | 1 | 0.36 % | | 1 | 0.24 % | | 14 | C D D C C C | S57SWR | 1 | 0.36 % | | 1 | 0.24 % | | 15 | C C D D D C C / C C C | SN100PS/QRP | 1 | 0.36 % | | 3 | 0.71 % | | 16 | C C D D C C | SN40RY | 1 | 0.36 % | | 2 | 0.47 % | | 17 | C C D D C C C C C | PI75VERON | 1 | 0.36 % | | 3 | 0.71 % | | 18 | C C D / C C D C C C | SV5/DL3DRN | 1 | 0.36 % | | 1 | 0.24 % | | 19 | C C D C / C C C | UI4F/QRP | 1 | 0.36 % | | 1 | 0.24 % | | 20 | C D D C | Z36N | 1 | 0.36 % | | 2 | 0.47 % | |
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