| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CN8BHA | 708 | 32.39 % | | 834 | 30.43 % | | 2 | C C D C C | CN2CO | 669 | 30.60 % | | 833 | 30.39 % | | 3 | C C D C | CN3A | 353 | 16.15 % | | 538 | 19.63 % | | 4 | C D C C C | C4ACA | 230 | 10.52 % | | 264 | 9.63 % | | 5 | C D C C | E7CW | 62 | 2.84 % | | 70 | 2.55 % | | 6 | C D D C | A44A | 31 | 1.42 % | | 40 | 1.46 % | | 7 | D C D C C | 4O3RR | 24 | 1.10 % | | 28 | 1.02 % | | 8 | D C D C C C | 2D0XPS | 18 | 0.82 % | | 18 | 0.66 % | | 9 | C D C | C4A | 16 | 0.73 % | | 28 | 1.02 % | | 10 | C D D C C | A61EK | 15 | 0.69 % | | 18 | 0.66 % | | 11 | D C D C | 3Z1K | 14 | 0.64 % | | 18 | 0.66 % | | 12 | C C D D D C | HF100I | 7 | 0.32 % | | 10 | 0.36 % | | 13 | C C D D D C C C | OE100KFV | 6 | 0.27 % | | 7 | 0.26 % | | 14 | C D D C C C | G14BBY | 5 | 0.23 % | | 5 | 0.18 % | | 15 | C C D D C C C | DJ70WAE | 4 | 0.18 % | | 4 | 0.15 % | | 16 | C D C C C / C | G0BPK/M | 3 | 0.14 % | | 3 | 0.11 % | | 17 | C C D C C C / C | DG6DAF/P | 3 | 0.14 % | | 3 | 0.11 % | | 18 | C C / C D C C C | DL/W4RAM | 1 | 0.05 % | | 1 | 0.04 % | | 19 | D C D D D C | 3Z100I | 1 | 0.05 % | | 3 | 0.11 % | | 20 | C C D / C C D C | EA5/LN2G | 1 | 0.05 % | | 1 | 0.04 % | | 21 | C / C C D C C | F/TK4QL | 1 | 0.05 % | | 1 | 0.04 % | | 22 | C D D D C | E770D | 1 | 0.05 % | | 1 | 0.04 % | | 23 | C C / C C D C C | DL/EA7JX | 1 | 0.05 % | | 1 | 0.04 % | | 24 | C C C D C | GIS7V | 1 | 0.05 % | | 1 | 0.04 % | | 25 | C C D C D C | DO7D0F | 1 | 0.05 % | | 1 | 0.04 % | | 26 | C C D C C C / C C C | IZ2JPN/QRP | 1 | 0.05 % | | 1 | 0.04 % | | 27 | C C / C D C C | LX/G1TP | 1 | 0.05 % | | 1 | 0.04 % | | 28 | C C / C C D C C C | LX/PA3DAT | 1 | 0.05 % | | 1 | 0.04 % | | 29 | C C D / C C D C C C | CT7/HB9AAP | 1 | 0.05 % | | 1 | 0.04 % | | 30 | C C D D D C C | OE100XA | 1 | 0.05 % | | 1 | 0.04 % | | 31 | C C D C C C C C | OM1OOCSR | 1 | 0.05 % | | 1 | 0.04 % | | 32 | C C D C C / D | RC7LI/3 | 1 | 0.05 % | | 1 | 0.04 % | | 33 | C C D D C | SQ44O | 1 | 0.05 % | | 1 | 0.04 % | | 34 | C C D C C C / D | UA4ASE/6 | 1 | 0.05 % | | 1 | 0.04 % | | 35 | C C D C C / C C C | YU1LM/QRP | 1 | 0.05 % | | 1 | 0.04 % | |
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