| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | CN3A | 26 | 37.14 % | | 27 | 38.03 % | | 2 | C C D C C | AB3CX | 16 | 22.86 % | | 16 | 22.54 % | | 3 | C D C C | E7DX | 10 | 14.29 % | | 10 | 14.08 % | | 4 | C C D C C C | IK3UNA | 6 | 8.57 % | | 6 | 8.45 % | | 5 | C D D C | P33W | 4 | 5.71 % | | 4 | 5.63 % | | 6 | C D C C C | F1DHX | 3 | 4.29 % | | 3 | 4.23 % | | 7 | D C D C | 9A7A | 2 | 2.86 % | | 2 | 2.82 % | | 8 | C D D C C | S51CK | 2 | 2.86 % | | 2 | 2.82 % | | 9 | C D C | D4C | 1 | 1.43 % | | 1 | 1.41 % | |
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