| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CT1BXT | 87 | 32.71 % | | 87 | 32.22 % | | 2 | C C D C C | AD4EB | 85 | 31.95 % | | 85 | 31.48 % | | 3 | C C D C | DR7T | 50 | 18.80 % | | 50 | 18.52 % | | 4 | C D C C C | F4FDR | 21 | 7.89 % | | 21 | 7.78 % | | 5 | C D C C | K3MM | 6 | 2.26 % | | 6 | 2.22 % | | 6 | C D C | G1N | 6 | 2.26 % | | 6 | 2.22 % | | 7 | C C D D C C | AO75AR | 5 | 1.88 % | | 5 | 1.85 % | | 8 | D C D C C C | 2E0INN | 3 | 1.13 % | | 3 | 1.11 % | | 9 | C C D D C C C | AO75URE | 1 | 0.38 % | | 1 | 0.37 % | | 10 | C C D D C | OG16M | 1 | 0.38 % | | 1 | 0.37 % | | 11 | C C / C C D C C | ON/LX1ER | 1 | 0.38 % | | 1 | 0.37 % | |
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