| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K4UIE | 10 | 33.33 % | | 10 | 33.33 % | | 2 | C C D C C | AA0RW | 8 | 26.67 % | | 8 | 26.67 % | | 3 | C D C C | N4NE | 5 | 16.67 % | | 5 | 16.67 % | | 4 | C C D C | KC3D | 4 | 13.33 % | | 4 | 13.33 % | | 5 | C C D C C C | KA4ZDR | 2 | 6.67 % | | 2 | 6.67 % | | 6 | C D C | N4J | 1 | 3.33 % | | 1 | 3.33 % | |
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