| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | KA0BOJ | 283 | 24.96 % | | 341 | 20.42 % | | 2 | C D C C C | K0DSL | 280 | 24.69 % | | 369 | 22.10 % | | 3 | C D C C | K0AD | 219 | 19.31 % | | 372 | 22.28 % | | 4 | C C D C C | AA0AW | 180 | 15.87 % | | 259 | 15.51 % | | 5 | C C D C | AA3B | 163 | 14.37 % | | 305 | 18.26 % | | 6 | C D C | K3Z | 2 | 0.18 % | | 8 | 0.48 % | | 7 | C C D C C / D | AB5ZA/7 | 2 | 0.18 % | | 2 | 0.12 % | | 8 | D C D C C | 4U1WB | 1 | 0.09 % | | 2 | 0.12 % | | 9 | D C D C | 8P5A | 1 | 0.09 % | | 4 | 0.24 % | | 10 | C D C C / C C D | N5NU/TI2 | 1 | 0.09 % | | 1 | 0.06 % | | 11 | C D D C C | V31XX | 1 | 0.09 % | | 4 | 0.24 % | | 12 | C D C C / D | W1AW/0 | 1 | 0.09 % | | 3 | 0.18 % | |
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