| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AB3CX | 337 | 33.94 % | | 430 | 35.57 % | | 2 | C C D C C C | CT2JVP | 289 | 29.10 % | | 320 | 26.47 % | | 3 | C C D C | AA3B | 200 | 20.14 % | | 259 | 21.42 % | | 4 | C D C C | D1HQ | 53 | 5.34 % | | 64 | 5.29 % | | 5 | C D C C C | F1AGR | 27 | 2.72 % | | 27 | 2.23 % | | 6 | D C D C C | 3V8SS | 21 | 2.11 % | | 28 | 2.32 % | | 7 | C D D C C | A47HQ | 18 | 1.81 % | | 26 | 2.15 % | | 8 | C D D C | E72U | 12 | 1.21 % | | 13 | 1.08 % | | 9 | D C D C | 3Z1K | 8 | 0.81 % | | 11 | 0.91 % | | 10 | C D C | C4F | 6 | 0.60 % | | 7 | 0.58 % | | 11 | D C D C C C | 4O6ATU | 6 | 0.60 % | | 6 | 0.50 % | | 12 | C C D D C | OG55W | 3 | 0.30 % | | 4 | 0.33 % | | 13 | D C / C C D C C | 5B/RN3QO | 2 | 0.20 % | | 2 | 0.17 % | | 14 | C D D C C C | E71EEE | 2 | 0.20 % | | 3 | 0.25 % | | 15 | C C D C C / C C C | YU1AM/QRP | 2 | 0.20 % | | 2 | 0.17 % | | 16 | C D C C C / C | F4GKR/P | 2 | 0.20 % | | 2 | 0.17 % | | 17 | D C D C C C / C | 9A5MPV/P | 1 | 0.10 % | | 1 | 0.08 % | | 18 | C C D C C D C C | EA6DK5ON | 1 | 0.10 % | | 1 | 0.08 % | | 19 | C C D D C C | LZ30OJ | 1 | 0.10 % | | 1 | 0.08 % | | 20 | C C D C C C C | TM1MOON | 1 | 0.10 % | | 1 | 0.08 % | | 21 | C D C C / D | R8MB/1 | 1 | 0.10 % | | 1 | 0.08 % | |
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