| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K5UTA | 13 | 46.43 % | | 13 | 46.43 % | | 2 | C C D C C C | KA8FQS | 6 | 21.43 % | | 6 | 21.43 % | | 3 | C D C C | K9HD | 4 | 14.29 % | | 4 | 14.29 % | | 4 | C C D C C | AE9MY | 3 | 10.71 % | | 3 | 10.71 % | | 5 | C C D C | AB8I | 2 | 7.14 % | | 2 | 7.14 % | |
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