| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AA1K | 71 | 36.04 % | | 72 | 36.00 % | | 2 | C C D C C | DF0CI | 35 | 17.77 % | | 36 | 18.00 % | | 3 | C D C C | E7DX | 25 | 12.69 % | | 25 | 12.50 % | | 4 | C C D C C C | DL1HAZ | 23 | 11.68 % | | 23 | 11.50 % | | 5 | C D C C C | F6FTB | 10 | 5.08 % | | 10 | 5.00 % | | 6 | C D D C | E77G | 10 | 5.08 % | | 10 | 5.00 % | | 7 | D C D C | 4L8A | 6 | 3.05 % | | 7 | 3.50 % | | 8 | D C D C C | 3V8SS | 5 | 2.54 % | | 5 | 2.50 % | | 9 | C D C | D4C | 5 | 2.54 % | | 5 | 2.50 % | | 10 | C D D C C | S51RE | 4 | 2.03 % | | 4 | 2.00 % | | 11 | C C D C C C C | DK0WRTC | 1 | 0.51 % | | 1 | 0.50 % | | 12 | C C D / C D C C | VP9/N3AD | 1 | 0.51 % | | 1 | 0.50 % | | 13 | C C / C C D C C | ZA/YT7DQ | 1 | 0.51 % | | 1 | 0.50 % | |
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