| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | DF0SX | 40 | 38.83 % | | 42 | 38.18 % | | 2 | C C D C | HA1A | 35 | 33.98 % | | 40 | 36.36 % | | 3 | C C D C C C | DL2SAX | 12 | 11.65 % | | 12 | 10.91 % | | 4 | C D C C | K3WW | 5 | 4.85 % | | 5 | 4.55 % | | 5 | D C D C | 9A3B | 4 | 3.88 % | | 4 | 3.64 % | | 6 | D C D C C | 9A2AJ | 2 | 1.94 % | | 2 | 1.82 % | | 7 | C D C C C | G3RLE | 2 | 1.94 % | | 2 | 1.82 % | | 8 | C / C C D C C | F/SQ6MS | 1 | 0.97 % | | 1 | 0.91 % | | 9 | D C D C C C | 9A1CFR | 1 | 0.97 % | | 1 | 0.91 % | | 10 | C D D C C | S53EO | 1 | 0.97 % | | 1 | 0.91 % | |
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