| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AC1U | 114 | 36.08 % | | 116 | 36.48 % | | 2 | C C D C C | AD4ES | 82 | 25.95 % | | 82 | 25.79 % | | 3 | C C D C C C | BI8FZA | 39 | 12.34 % | | 39 | 12.26 % | | 4 | C D C C | F2CW | 19 | 6.01 % | | 19 | 5.97 % | | 5 | C D D C | E77W | 12 | 3.80 % | | 12 | 3.77 % | | 6 | D C D C C | 4K6FO | 9 | 2.85 % | | 9 | 2.83 % | | 7 | C D C | E2X | 8 | 2.53 % | | 8 | 2.52 % | | 8 | D C D C | 4L0A | 5 | 1.58 % | | 5 | 1.57 % | | 9 | C D C C C | F4VSQ | 5 | 1.58 % | | 5 | 1.57 % | | 10 | C D D C C | E77EA | 5 | 1.58 % | | 5 | 1.57 % | | 11 | C C D D C C C | DM65MVP | 4 | 1.27 % | | 4 | 1.26 % | | 12 | D C D C C C | 2E0CVN | 3 | 0.95 % | | 3 | 0.94 % | | 13 | C C D D C | LY74A | 3 | 0.95 % | | 3 | 0.94 % | | 14 | C C / C C D C C | OZ/DJ1XT | 2 | 0.63 % | | 2 | 0.63 % | | 15 | D C D D C | 9A36W | 2 | 0.63 % | | 2 | 0.63 % | | 16 | D C D D C C C | 4U80FOC | 1 | 0.32 % | | 1 | 0.31 % | | 17 | C C D D C C C C C C | OL90ITALIA | 1 | 0.32 % | | 1 | 0.31 % | | 18 | C C D C C C C | DA0WRTC | 1 | 0.32 % | | 1 | 0.31 % | | 19 | C C D / C C D C C C | SV5/DL3DRN | 1 | 0.32 % | | 1 | 0.31 % | |
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