| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AA7V | 231 | 25.22 % | | 294 | 27.00 % | | 2 | C C D C C | AA1ON | 228 | 24.89 % | | 252 | 23.14 % | | 3 | C D C C | F5IN | 198 | 21.62 % | | 247 | 22.68 % | | 4 | C C D C C C | BD1IIJ | 139 | 15.17 % | | 146 | 13.41 % | | 5 | C D C C C | F5MUX | 68 | 7.42 % | | 78 | 7.16 % | | 6 | C D D C C | A35EU | 10 | 1.09 % | | 15 | 1.38 % | | 7 | D C D C | 4E1A | 9 | 0.98 % | | 12 | 1.10 % | | 8 | C D C | B4T | 7 | 0.76 % | | 16 | 1.47 % | | 9 | C D D C | P33W | 6 | 0.66 % | | 7 | 0.64 % | | 10 | D C D C C | 4Z5LY | 5 | 0.55 % | | 5 | 0.46 % | | 11 | D C D C C C | 6K2ILX | 4 | 0.44 % | | 5 | 0.46 % | | 12 | C D C C / D | K0XB/6 | 3 | 0.33 % | | 3 | 0.28 % | | 13 | C C D D C | OG60F | 2 | 0.22 % | | 3 | 0.28 % | | 14 | C C D D C C | HA90AM | 1 | 0.11 % | | 1 | 0.09 % | | 15 | C C D / C C D C | IH9/OL3R | 1 | 0.11 % | | 1 | 0.09 % | | 16 | C C D C C / D | AF5DM/0 | 1 | 0.11 % | | 1 | 0.09 % | | 17 | C C D D D C C C | SO100ZHP | 1 | 0.11 % | | 1 | 0.09 % | | 18 | C C D C C C / D | VE3RSA/7 | 1 | 0.11 % | | 1 | 0.09 % | | 19 | C C D D D C | YR100R | 1 | 0.11 % | | 1 | 0.09 % | |
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