| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA4DD | 357 | 36.65 % | | 609 | 38.67 % | | 2 | C C D C C C | CN8AEI | 345 | 35.42 % | | 538 | 34.16 % | | 3 | C C D C | AA3B | 102 | 10.47 % | | 182 | 11.56 % | | 4 | C D C C C | F1TRE | 67 | 6.88 % | | 93 | 5.90 % | | 5 | C D C C | F5IN | 33 | 3.39 % | | 48 | 3.05 % | | 6 | C D D C C | E77EA | 18 | 1.85 % | | 28 | 1.78 % | | 7 | C D D C | E70T | 14 | 1.44 % | | 20 | 1.27 % | | 8 | D C D C C | 0N3ND | 9 | 0.92 % | | 14 | 0.89 % | | 9 | D C D C | 4O0A | 6 | 0.62 % | | 11 | 0.70 % | | 10 | C D C | F5Y | 4 | 0.41 % | | 5 | 0.32 % | | 11 | C C D C C C / C | DL2DXA/P | 4 | 0.41 % | | 5 | 0.32 % | | 12 | C C D C C / C | DL1ZM/M | 3 | 0.31 % | | 3 | 0.19 % | | 13 | C C D C C C / C C C | EA1BYA/QRP | 2 | 0.21 % | | 2 | 0.13 % | | 14 | D C D C C C | 4O3RAB | 2 | 0.21 % | | 3 | 0.19 % | | 15 | C C / C C D C C | OK/LZ3SF | 2 | 0.21 % | | 2 | 0.13 % | | 16 | C D C C C / C | F5VHE/P | 1 | 0.10 % | | 1 | 0.06 % | | 17 | C C D / C D C C C | CT7/F6HBR | 1 | 0.10 % | | 3 | 0.19 % | | 18 | C C D D C C C | HF67CES | 1 | 0.10 % | | 3 | 0.19 % | | 19 | C D / C C D C C C | I2/HB9FIH | 1 | 0.10 % | | 3 | 0.19 % | | 20 | C C D D D C C | DL500ML | 1 | 0.10 % | | 1 | 0.06 % | | 21 | C C D / C C D C C C | SV5/DL3DRN | 1 | 0.10 % | | 1 | 0.06 % | |
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