| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | CN3A | 26 | 50.98 % | | 27 | 51.92 % | | 2 | C C D C C | AB3CX | 10 | 19.61 % | | 10 | 19.23 % | | 3 | C D C C | G3CO | 8 | 15.69 % | | 8 | 15.38 % | | 4 | C C D C C C | EA5DFV | 3 | 5.88 % | | 3 | 5.77 % | | 5 | D C D C | 9A9A | 1 | 1.96 % | | 1 | 1.92 % | | 6 | C D D C | S50C | 1 | 1.96 % | | 1 | 1.92 % | | 7 | C D D C C | S57DX | 1 | 1.96 % | | 1 | 1.92 % | | 8 | C D C C C | W3LPL | 1 | 1.96 % | | 1 | 1.92 % | |
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