| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0EA | 114 | 40.57 % | | 127 | 41.23 % | | 2 | C D C C C | K0ANT | 79 | 28.11 % | | 86 | 27.92 % | | 3 | C C D C | AA3B | 34 | 12.10 % | | 36 | 11.69 % | | 4 | C C D C C | AA4NC | 24 | 8.54 % | | 27 | 8.77 % | | 5 | C C D C C C | KA0NES | 17 | 6.05 % | | 18 | 5.84 % | | 6 | C D C | K4W | 9 | 3.20 % | | 10 | 3.25 % | | 7 | D C D C C | 7D1SJ | 1 | 0.36 % | | 1 | 0.32 % | | 8 | C D C C C D | K9DIY4 | 1 | 0.36 % | | 1 | 0.32 % | | 9 | C D C C C D C | N9RJV2A | 1 | 0.36 % | | 1 | 0.32 % | | 10 | C D C D | W4D0 | 1 | 0.36 % | | 1 | 0.32 % | |
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