| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | AA6AIR | 788 | 37.67 % | | 1073 | 35.48 % | | 2 | C C D C C | AB3CX | 549 | 26.24 % | | 741 | 24.50 % | | 3 | C C D C | AB5X | 417 | 19.93 % | | 721 | 23.84 % | | 4 | C D C C | E7AR | 84 | 4.02 % | | 108 | 3.57 % | | 5 | C D C C C | F4EFI | 80 | 3.82 % | | 102 | 3.37 % | | 6 | D C D C C | 3B9KW | 32 | 1.53 % | | 48 | 1.59 % | | 7 | D C D C | 3B8M | 31 | 1.48 % | | 56 | 1.85 % | | 8 | C D D C | A44A | 28 | 1.34 % | | 39 | 1.29 % | | 9 | C D C | B0A | 26 | 1.24 % | | 52 | 1.72 % | | 10 | C D D C C | A65DF | 25 | 1.20 % | | 43 | 1.42 % | | 11 | D C D C C C | 4E1AGW | 14 | 0.67 % | | 18 | 0.60 % | | 12 | C D D C C C | E20WUE | 5 | 0.24 % | | 8 | 0.26 % | | 13 | C C D C C C / D | JA0VTK/7 | 3 | 0.14 % | | 4 | 0.13 % | | 14 | D C D C C C / D | 7K1MAG/2 | 2 | 0.10 % | | 2 | 0.07 % | | 15 | C D D / C C D C C C | A65/DL2RMC | 1 | 0.05 % | | 1 | 0.03 % | | 16 | D C / C C D C C | 4L/LY4ZZ | 1 | 0.05 % | | 2 | 0.07 % | | 17 | C C D / C C D C C C | EA8/GU4YOX | 1 | 0.05 % | | 1 | 0.03 % | | 18 | C C D C / C C C | BG5O/QRP | 1 | 0.05 % | | 1 | 0.03 % | | 19 | C C D / C C D C C | IS0/OM2TW | 1 | 0.05 % | | 1 | 0.03 % | | 20 | C D C C C C | E2OWUE | 1 | 0.05 % | | 1 | 0.03 % | | 21 | C C D C / D | RN1B/0 | 1 | 0.05 % | | 1 | 0.03 % | | 22 | C C D C C C / C C C | YC1LJT/QRP | 1 | 0.05 % | | 1 | 0.03 % | |
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