| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | CN2AA | 372 | 36.94 % | | 379 | 36.65 % | | 2 | C C D C C C | DB1BAN | 289 | 28.70 % | | 297 | 28.72 % | | 3 | C C D C | CS2C | 192 | 19.07 % | | 201 | 19.44 % | | 4 | C D C C | D1WW | 37 | 3.67 % | | 37 | 3.58 % | | 5 | C D C C C | C6ARU | 35 | 3.48 % | | 36 | 3.48 % | | 6 | C D D C | A44A | 28 | 2.78 % | | 29 | 2.80 % | | 7 | C D D C C | A65CA | 18 | 1.79 % | | 18 | 1.74 % | | 8 | D C D C C | 3V8CB | 15 | 1.49 % | | 16 | 1.55 % | | 9 | C D C | G2X | 9 | 0.89 % | | 9 | 0.87 % | | 10 | D C D C | 9A3B | 4 | 0.40 % | | 4 | 0.39 % | | 11 | D C D C C C | 2E0SDV | 2 | 0.20 % | | 2 | 0.19 % | | 12 | C / C D C C C | F/G4BJM | 1 | 0.10 % | | 1 | 0.10 % | | 13 | C C D C C C C | DF0WRTC | 1 | 0.10 % | | 1 | 0.10 % | | 14 | C C D / C C D C C | HB0/DL5SE | 1 | 0.10 % | | 1 | 0.10 % | | 15 | C C D C C / C C | RA0LQ/MM | 1 | 0.10 % | | 1 | 0.10 % | | 16 | C D D C C C | S57NAW | 1 | 0.10 % | | 1 | 0.10 % | | 17 | C C / C C D C C | ZA/OH2BH | 1 | 0.10 % | | 1 | 0.10 % | |
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