| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CT1BWU | 92 | 34.20 % | | 94 | 34.18 % | | 2 | C C D C C | AA4DD | 84 | 31.23 % | | 86 | 31.27 % | | 3 | C D C C C | F5LMJ | 30 | 11.15 % | | 30 | 10.91 % | | 4 | C D C C | F5CQ | 27 | 10.04 % | | 27 | 9.82 % | | 5 | C C D C | AA8R | 17 | 6.32 % | | 18 | 6.55 % | | 6 | D C D C C | 4Z1TL | 4 | 1.49 % | | 4 | 1.45 % | | 7 | C D D C C | E73KM | 4 | 1.49 % | | 4 | 1.45 % | | 8 | C D C C / D | K1PL/4 | 3 | 1.12 % | | 3 | 1.09 % | | 9 | C D D C | E77M | 2 | 0.74 % | | 2 | 0.73 % | | 10 | C D D C C C | E21YDP | 1 | 0.37 % | | 1 | 0.36 % | | 11 | D C D C C C | 9M6XRO | 1 | 0.37 % | | 1 | 0.36 % | | 12 | D C D C | 9A7B | 1 | 0.37 % | | 1 | 0.36 % | | 13 | C D C | M7T | 1 | 0.37 % | | 1 | 0.36 % | | 14 | C C D C C C / D | WB2RHM/4 | 1 | 0.37 % | | 2 | 0.73 % | | 15 | C C D C / D | WS6K/8 | 1 | 0.37 % | | 1 | 0.36 % | |
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