| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0CIE | 282 | 26.91 % | | 366 | 23.18 % | | 2 | C C D C C C | KA0JQF | 272 | 25.95 % | | 335 | 21.22 % | | 3 | C D C C | K0AP | 212 | 20.23 % | | 396 | 25.08 % | | 4 | C C D C | AA0Z | 146 | 13.93 % | | 261 | 16.53 % | | 5 | C C D C C | AA0FO | 128 | 12.21 % | | 204 | 12.92 % | | 6 | D C D C | 7Q6M | 2 | 0.19 % | | 7 | 0.44 % | | 7 | D C D C C | 4U1WB | 1 | 0.10 % | | 2 | 0.13 % | | 8 | C C D C C C / C | KD6HOF/M | 1 | 0.10 % | | 1 | 0.06 % | | 9 | C C D C / D | NE8O/4 | 1 | 0.10 % | | 2 | 0.13 % | | 10 | C D D C C | V31XX | 1 | 0.10 % | | 3 | 0.19 % | | 11 | C D C C C / C | W4SUY/M | 1 | 0.10 % | | 1 | 0.06 % | | 12 | C D C C / D | W8UF/4 | 1 | 0.10 % | | 1 | 0.06 % | |
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