| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AC4CA | 247 | 30.34 % | | 390 | 29.79 % | | 2 | C C D C C C | CT7AGZ | 203 | 24.94 % | | 306 | 23.38 % | | 3 | C C D C | AB2A | 159 | 19.53 % | | 291 | 22.23 % | | 4 | C D C C | F2IL | 97 | 11.92 % | | 164 | 12.53 % | | 5 | C D C C C | F1TRE | 65 | 7.99 % | | 99 | 7.56 % | | 6 | D C D C C | 4X1VF | 12 | 1.47 % | | 15 | 1.15 % | | 7 | C D D C C | E70AW | 8 | 0.98 % | | 8 | 0.61 % | | 8 | C D D C | A62A | 5 | 0.61 % | | 8 | 0.61 % | | 9 | D C D C | 4L8A | 3 | 0.37 % | | 5 | 0.38 % | | 10 | D C D C C C | 9A1CFR | 2 | 0.25 % | | 5 | 0.38 % | | 11 | C C D / C C D C C C | CT9/DL3KWF | 2 | 0.25 % | | 2 | 0.15 % | | 12 | C C D D C C | HA50VQ | 2 | 0.25 % | | 5 | 0.38 % | | 13 | C D C | M1X | 2 | 0.25 % | | 3 | 0.23 % | | 14 | C C D / C C D C | EA6/EA3M | 1 | 0.12 % | | 1 | 0.08 % | | 15 | C D / C D D C | E7/Z35M | 1 | 0.12 % | | 1 | 0.08 % | | 16 | D C D D C | 9A50Y | 1 | 0.12 % | | 1 | 0.08 % | | 17 | C C / C C D C C | LX/PA8AD | 1 | 0.12 % | | 1 | 0.08 % | | 18 | C D D C C C | E29TGW | 1 | 0.12 % | | 1 | 0.08 % | | 19 | C C D D D C C C | OE120BKC | 1 | 0.12 % | | 2 | 0.15 % | | 20 | C D D D D C | S5030R | 1 | 0.12 % | | 1 | 0.08 % | |
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