| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K1EBY | 77 | 33.92 % | | 79 | 34.20 % | | 2 | C C D C C C | KA1CQR | 52 | 22.91 % | | 52 | 22.51 % | | 3 | C D C C | K0BJ | 39 | 17.18 % | | 41 | 17.75 % | | 4 | C C D C | AF7S | 29 | 12.78 % | | 29 | 12.55 % | | 5 | C C D C C | AA3LX | 28 | 12.33 % | | 28 | 12.12 % | | 6 | C D C C C / C C D | K6WDE/KH6 | 1 | 0.44 % | | 1 | 0.43 % | | 7 | D C D C | 8P5A | 1 | 0.44 % | | 1 | 0.43 % | |
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