| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K5PIG | 9 | 39.13 % | | 9 | 39.13 % | | 2 | C D C C | N5AT | 6 | 26.09 % | | 6 | 26.09 % | | 3 | C C D C C C | KD9QGK | 4 | 17.39 % | | 4 | 17.39 % | | 4 | C C D C C | KD4XR | 3 | 13.04 % | | 3 | 13.04 % | | 5 | C C D C | KX0A | 1 | 4.35 % | | 1 | 4.35 % | |
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