| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0DJO | 104 | 34.32 % | | 110 | 34.70 % | | 2 | C D C C | K0SI | 82 | 27.06 % | | 84 | 26.50 % | | 3 | C C D C C C | IW0CUK | 51 | 16.83 % | | 53 | 16.72 % | | 4 | C C D C C | AA3YW | 29 | 9.57 % | | 31 | 9.78 % | | 5 | C C D C | AA3B | 19 | 6.27 % | | 20 | 6.31 % | | 6 | C D C | K0N | 17 | 5.61 % | | 18 | 5.68 % | | 7 | C D C C C C | W5ZUNW | 1 | 0.33 % | | 1 | 0.32 % | |
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