| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CO2AME | 207 | 32.50 % | | 221 | 31.13 % | | 2 | C C D C C | AA0AW | 175 | 27.47 % | | 203 | 28.59 % | | 3 | C C D C | AA3B | 111 | 17.43 % | | 132 | 18.59 % | | 4 | C D C C C | D1CTT | 50 | 7.85 % | | 53 | 7.46 % | | 5 | C D C C | K3LR | 41 | 6.44 % | | 44 | 6.20 % | | 6 | C D D C C | A61EK | 8 | 1.26 % | | 9 | 1.27 % | | 7 | C D C | G2U | 7 | 1.10 % | | 8 | 1.13 % | | 8 | D C D C | 3Z6O | 7 | 1.10 % | | 8 | 1.13 % | | 9 | C D D C | A44A | 7 | 1.10 % | | 7 | 0.99 % | | 10 | D C D C C | 4Z4DX | 6 | 0.94 % | | 6 | 0.85 % | | 11 | D C D C C C | 2E0CVN | 5 | 0.78 % | | 6 | 0.85 % | | 12 | C C D D C C C | DL50NFA | 3 | 0.47 % | | 3 | 0.42 % | | 13 | C C D D D C C | EM235QM | 2 | 0.31 % | | 2 | 0.28 % | | 14 | C C / C C D C | FP/KV1J | 1 | 0.16 % | | 1 | 0.14 % | | 15 | C C D C C C / D | JH8KYU/1 | 1 | 0.16 % | | 1 | 0.14 % | | 16 | D C D D C C | 3Z50KP | 1 | 0.16 % | | 1 | 0.14 % | | 17 | C C / C C D C C | OZ/DJ5LA | 1 | 0.16 % | | 1 | 0.14 % | | 18 | C C D D C | OZ11A | 1 | 0.16 % | | 1 | 0.14 % | | 19 | C C D D C C | OZ30EU | 1 | 0.16 % | | 1 | 0.14 % | | 20 | C C D C / D | WX8C/0 | 1 | 0.16 % | | 1 | 0.14 % | | 21 | C C D C C / C C C | YU1LM/QRP | 1 | 0.16 % | | 1 | 0.14 % | |
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