| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K5VPP | 11 | 33.33 % | | 11 | 33.33 % | | 2 | C C D C C C | KE5FSY | 10 | 30.30 % | | 10 | 30.30 % | | 3 | C D C C | K5OK | 6 | 18.18 % | | 6 | 18.18 % | | 4 | C C D C C | AA0PK | 5 | 15.15 % | | 5 | 15.15 % | | 5 | C C D C | NO5G | 1 | 3.03 % | | 1 | 3.03 % | |
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