| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AK1MD | 198 | 37.01 % | | 199 | 36.58 % | | 2 | C C D C C C | CT2GSN | 158 | 29.53 % | | 164 | 30.15 % | | 3 | C C D C | AF1T | 94 | 17.57 % | | 95 | 17.46 % | | 4 | C D C C C | F5PYJ | 26 | 4.86 % | | 26 | 4.78 % | | 5 | C D C C | E7CW | 15 | 2.80 % | | 15 | 2.76 % | | 6 | C D D C | E70T | 14 | 2.62 % | | 14 | 2.57 % | | 7 | C D D C C | E77DX | 8 | 1.50 % | | 8 | 1.47 % | | 8 | D C D C | 4L2M | 6 | 1.12 % | | 6 | 1.10 % | | 9 | D C D C C C | 2E0PLA | 4 | 0.75 % | | 5 | 0.92 % | | 10 | C C D D C C C | DL50DAH | 2 | 0.37 % | | 2 | 0.37 % | | 11 | D C D C C | 9A2EU | 2 | 0.37 % | | 2 | 0.37 % | | 12 | C C D D D C | SN550K | 2 | 0.37 % | | 2 | 0.37 % | | 13 | C C D D D C C | HF550MK | 1 | 0.19 % | | 1 | 0.18 % | | 14 | C D C C C / C | M0PLX/M | 1 | 0.19 % | | 1 | 0.18 % | | 15 | C C D D C | OZ11A | 1 | 0.19 % | | 1 | 0.18 % | | 16 | C D C | G5K | 1 | 0.19 % | | 1 | 0.18 % | | 17 | C C / C C D C C | SP/UR5AS | 1 | 0.19 % | | 1 | 0.18 % | | 18 | C D D C C C | Z66BCC | 1 | 0.19 % | | 1 | 0.18 % | |
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