| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0ACP | 496 | 37.21 % | | 618 | 37.68 % | | 2 | C D C C | K0EA | 329 | 24.68 % | | 442 | 26.95 % | | 3 | C C D C C C | KA0GOA | 206 | 15.45 % | | 226 | 13.78 % | | 4 | C C D C C | AA0RW | 140 | 10.50 % | | 169 | 10.30 % | | 5 | C C D C | AA3B | 107 | 8.03 % | | 120 | 7.32 % | | 6 | C D C | K0E | 47 | 3.53 % | | 57 | 3.48 % | | 7 | D C D C C | 7D1SJ | 1 | 0.08 % | | 1 | 0.06 % | | 8 | C D C C C D | K9DIY4 | 1 | 0.08 % | | 1 | 0.06 % | | 9 | C C D C C C / C | KC6IKI/M | 1 | 0.08 % | | 1 | 0.06 % | | 10 | C C D D C C | KM40VT | 1 | 0.08 % | | 1 | 0.06 % | | 11 | C D C C C D C | N9RJV2A | 1 | 0.08 % | | 1 | 0.06 % | | 12 | C D C C C / D | W0EAR/9 | 1 | 0.08 % | | 1 | 0.06 % | | 13 | C D C D | W4D0 | 1 | 0.08 % | | 1 | 0.06 % | | 14 | C D D C C | W82PF | 1 | 0.08 % | | 1 | 0.06 % | |
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