| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CE3CBM | 1652 | 24.76 % | | 2533 | 18.80 % | | 2 | C C D C C | AA0AI | 1483 | 22.22 % | | 2681 | 19.90 % | | 3 | C D C C | D1DX | 1178 | 17.65 % | | 3187 | 23.66 % | | 4 | C C D C | AA0O | 1154 | 17.29 % | | 2735 | 20.30 % | | 5 | C D C C C | C6AGU | 884 | 13.25 % | | 1743 | 12.94 % | | 6 | C D D C | A44A | 64 | 0.96 % | | 138 | 1.02 % | | 7 | C D D C C | A35JP | 51 | 0.76 % | | 82 | 0.61 % | | 8 | D C D C C | 3D2AG | 48 | 0.72 % | | 94 | 0.70 % | | 9 | D C D C | 3B8M | 43 | 0.64 % | | 86 | 0.64 % | | 10 | C D C | C4W | 38 | 0.57 % | | 66 | 0.49 % | | 11 | D C D C C C | 2E0CVN | 13 | 0.19 % | | 18 | 0.13 % | | 12 | C C D / C C D C | EA8/OK5D | 6 | 0.09 % | | 9 | 0.07 % | | 13 | C C D C C C / D | JA4XHF/3 | 5 | 0.07 % | | 7 | 0.05 % | | 14 | C C D / C C D C C C | EA8/DL2DXA | 4 | 0.06 % | | 6 | 0.04 % | | 15 | C C D / C C D C C | DV8/KH7EA | 4 | 0.06 % | | 4 | 0.03 % | | 16 | C C D D C C | HB90OS | 4 | 0.06 % | | 8 | 0.06 % | | 17 | C D D C C C | E20HHK | 4 | 0.06 % | | 6 | 0.04 % | | 18 | C D / C C D C | V3/WX4G | 3 | 0.04 % | | 3 | 0.02 % | | 19 | C D C C / D | K0XB/6 | 3 | 0.04 % | | 4 | 0.03 % | | 20 | D C / C C D C C | 5B/RN3QO | 2 | 0.03 % | | 4 | 0.03 % | | 21 | C C D D C | LX75V | 2 | 0.03 % | | 3 | 0.02 % | | 22 | C C D D C C C | HB90AWS | 2 | 0.03 % | | 6 | 0.04 % | | 23 | C C D C / D | AI0Y/9 | 2 | 0.03 % | | 5 | 0.04 % | | 24 | C C / C C D C C | FS/VA3DF | 2 | 0.03 % | | 2 | 0.01 % | | 25 | C C / C D C C | FO/K5WI | 2 | 0.03 % | | 5 | 0.04 % | | 26 | C C D C C / C D | KH6KG/W5 | 2 | 0.03 % | | 6 | 0.04 % | | 27 | C C D C / C D | NH6T/W4 | 2 | 0.03 % | | 3 | 0.02 % | | 28 | C C / C D C C C | FO/F6BCW | 1 | 0.01 % | | 4 | 0.03 % | | 29 | C C D / C D C C C | CT7/G4BJM | 1 | 0.01 % | | 1 | 0.01 % | | 30 | D C D D D C C C | 3Z100PIP | 1 | 0.01 % | | 4 | 0.03 % | | 31 | D C / C C D C | 9A/AI6V | 1 | 0.01 % | | 2 | 0.01 % | | 32 | C C D C C C / C C | IU1DUB/MM | 1 | 0.01 % | | 2 | 0.01 % | | 33 | D C D / C C D C C | 8R1/AG6UT | 1 | 0.01 % | | 5 | 0.04 % | | 34 | D C D C C C / D | 7K1MAG/2 | 1 | 0.01 % | | 1 | 0.01 % | | 35 | C D C C C / C | M1EYP/P | 1 | 0.01 % | | 1 | 0.01 % | | 36 | C / C D C C | F/W0NB | 1 | 0.01 % | | 1 | 0.01 % | | 37 | C C D / C D C C | PJ7/K0CD | 1 | 0.01 % | | 1 | 0.01 % | | 38 | C C D C C / D | RZ9SZ/3 | 1 | 0.01 % | | 1 | 0.01 % | | 39 | C C D C C C / C | US7IGN/P | 1 | 0.01 % | | 1 | 0.01 % | | 40 | C C D D C C C C C | DQ12OOASP | 1 | 0.01 % | | 1 | 0.01 % | | 41 | C D / C C D C C | W1/PY1MX | 1 | 0.01 % | | 1 | 0.01 % | | 42 | C D / C D D C C | W2/E78WW | 1 | 0.01 % | | 1 | 0.01 % | | 43 | C C D C C / C C | YL3IZ/MM | 1 | 0.01 % | | 1 | 0.01 % | |
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