| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0WPM | 9 | 60.00 % | | 9 | 56.25 % | | 2 | C C D C C | KE0PX | 3 | 20.00 % | | 4 | 25.00 % | | 3 | C C D C C C | KF4DVF | 1 | 6.67 % | | 1 | 6.25 % | | 4 | C D C C | N8SL | 1 | 6.67 % | | 1 | 6.25 % | | 5 | C C D C | NZ2X | 1 | 6.67 % | | 1 | 6.25 % | |
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