| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CT1BOL | 792 | 31.33 % | | 1055 | 27.95 % | | 2 | C C D C C | AB3CX | 714 | 28.24 % | | 1038 | 27.50 % | | 3 | C C D C | AA3B | 483 | 19.11 % | | 896 | 23.74 % | | 4 | C D C C C | F1DHX | 220 | 8.70 % | | 295 | 7.82 % | | 5 | C D C C | D1DX | 119 | 4.71 % | | 184 | 4.88 % | | 6 | C D D C | A44A | 38 | 1.50 % | | 73 | 1.93 % | | 7 | C D D C C | A61QQ | 32 | 1.27 % | | 40 | 1.06 % | | 8 | D C D C | 3G1D | 29 | 1.15 % | | 45 | 1.19 % | | 9 | D C D C C | 3A2MG | 29 | 1.15 % | | 39 | 1.03 % | | 10 | C D C | B1Z | 26 | 1.03 % | | 49 | 1.30 % | | 11 | D C D C C C | 2E0CNL | 7 | 0.28 % | | 9 | 0.24 % | | 12 | C C D C C C / D | IK1ZOF/3 | 4 | 0.16 % | | 4 | 0.11 % | | 13 | C C D D C C C | DL50NFA | 4 | 0.16 % | | 8 | 0.21 % | | 14 | C D D C C C | D68CCC | 4 | 0.16 % | | 7 | 0.19 % | | 15 | C C D / C C D C C | IG9/LZ2SX | 3 | 0.12 % | | 3 | 0.08 % | | 16 | C C D C C C / C | DL4MEV/M | 3 | 0.12 % | | 3 | 0.08 % | | 17 | C C D D C | LG80T | 3 | 0.12 % | | 4 | 0.11 % | | 18 | C C / C C D C C C | DL/PA3DAT | 2 | 0.08 % | | 2 | 0.05 % | | 19 | C C D C C C / C C C | IW0GYT/QRP | 2 | 0.08 % | | 2 | 0.05 % | | 20 | C C D / C C D C | EA5/LN2G | 2 | 0.08 % | | 2 | 0.05 % | | 21 | C C D C C / C | DG6CA/P | 2 | 0.08 % | | 2 | 0.05 % | | 22 | D C D D C C C | 3Z50DVP | 1 | 0.04 % | | 3 | 0.08 % | | 23 | C D C C C / C | G6ZLA/M | 1 | 0.04 % | | 1 | 0.03 % | | 24 | C D / C C D C C C | I0/PB0SJX | 1 | 0.04 % | | 1 | 0.03 % | | 25 | D C D D C C | 3Z15UE | 1 | 0.04 % | | 1 | 0.03 % | | 26 | C C D D D D C C C | DQ1200ASP | 1 | 0.04 % | | 1 | 0.03 % | | 27 | C C D / C C D C C C | CT7/HB9AAP | 1 | 0.04 % | | 1 | 0.03 % | | 28 | C C D C C C C | EH3ICCD | 1 | 0.04 % | | 1 | 0.03 % | | 29 | C C / C D C C C | LX/G1TPA | 1 | 0.04 % | | 1 | 0.03 % | | 30 | C C / C C D C C | ON/PD1AT | 1 | 0.04 % | | 1 | 0.03 % | | 31 | C C D D C C | OZ30EU | 1 | 0.04 % | | 3 | 0.08 % | |
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