| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AA3B | 45 | 42.45 % | | 53 | 44.54 % | | 2 | C C D C C | AA4LR | 26 | 24.53 % | | 27 | 22.69 % | | 3 | C D C C | K0AD | 18 | 16.98 % | | 21 | 17.65 % | | 4 | C D C C C | K0LUZ | 6 | 5.66 % | | 6 | 5.04 % | | 5 | C C D C C C | VE2BWL | 4 | 3.77 % | | 4 | 3.36 % | | 6 | D C D C | 4M1K | 3 | 2.83 % | | 4 | 3.36 % | | 7 | C D D C | P40W | 2 | 1.89 % | | 2 | 1.68 % | | 8 | D C D C C | 9A2NA | 1 | 0.94 % | | 1 | 0.84 % | | 9 | C C D C / D | NW3Y/1 | 1 | 0.94 % | | 1 | 0.84 % | |
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