| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA4AK | 337 | 31.23 % | | 513 | 33.71 % | | 2 | C C D C | AA1K | 223 | 20.67 % | | 320 | 21.02 % | | 3 | C C D C C C | CE3DNP | 203 | 18.81 % | | 235 | 15.44 % | | 4 | C D C C | B4HQ | 158 | 14.64 % | | 222 | 14.59 % | | 5 | C D C C C | F4GFT | 73 | 6.77 % | | 87 | 5.72 % | | 6 | D C D C C | 3V8SS | 18 | 1.67 % | | 35 | 2.30 % | | 7 | C D D C C | A45WG | 16 | 1.48 % | | 32 | 2.10 % | | 8 | C D D C | E74O | 14 | 1.30 % | | 24 | 1.58 % | | 9 | C D C | C4I | 10 | 0.93 % | | 19 | 1.25 % | | 10 | C C D C / D | NE8O/4 | 4 | 0.37 % | | 4 | 0.26 % | | 11 | C C D C C / C | DF6FM/M | 3 | 0.28 % | | 4 | 0.26 % | | 12 | D C D C | 3Z0X | 2 | 0.19 % | | 5 | 0.33 % | | 13 | C D D C C C | E21YDP | 2 | 0.19 % | | 3 | 0.20 % | | 14 | C C D C C C / C | DL7USW/P | 2 | 0.19 % | | 2 | 0.13 % | | 15 | C C D C C C / D | JA4XHF/3 | 2 | 0.19 % | | 2 | 0.13 % | | 16 | D C D C C C | 9A1CFR | 2 | 0.19 % | | 2 | 0.13 % | | 17 | C C / C C D C C | ON/HA8MT | 2 | 0.19 % | | 2 | 0.13 % | | 18 | C C D C C / D | RA4BQ/3 | 2 | 0.19 % | | 2 | 0.13 % | | 19 | C / C C D C C C / C |
F/MM0JOM/P | 1 | 0.09 % | | 1 | 0.07 % | | 20 | C D C C C / D | K9QVB/9 | 1 | 0.09 % | | 1 | 0.07 % | | 21 | C D C C C / C | F6ACV/P | 1 | 0.09 % | | 1 | 0.07 % | | 22 | C C D C C C C C | DL0POLIO | 1 | 0.09 % | | 2 | 0.13 % | | 23 | C C D / C C D C | HB0/RC3C | 1 | 0.09 % | | 2 | 0.13 % | | 24 | C D C C / D | W1AW/9 | 1 | 0.09 % | | 2 | 0.13 % | |
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