| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0EJ | 86 | 54.09 % | | 179 | 57.01 % | | 2 | C C D C | AA3B | 39 | 24.53 % | | 82 | 26.11 % | | 3 | C D C C C | K0VBU | 15 | 9.43 % | | 26 | 8.28 % | | 4 | C C D C C | AA9RK | 13 | 8.18 % | | 20 | 6.37 % | | 5 | C C D C C C | KA6BIM | 6 | 3.77 % | | 7 | 2.23 % | |
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