| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0USA | 8 | 40.00 % | | 8 | 40.00 % | | 2 | C D C C | N5WF | 4 | 20.00 % | | 4 | 20.00 % | | 3 | C C D C C C | KD5DMT | 3 | 15.00 % | | 3 | 15.00 % | | 4 | C C D C C | KN5TX | 3 | 15.00 % | | 3 | 15.00 % | | 5 | C C D C | KT9Y | 2 | 10.00 % | | 2 | 10.00 % | |
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