| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K4GNV | 5 | 41.67 % | | 5 | 41.67 % | | 2 | C D C C | K4NN | 2 | 16.67 % | | 2 | 16.67 % | | 3 | C C D C C | KF5DC | 2 | 16.67 % | | 2 | 16.67 % | | 4 | C C D D | NK40 | 1 | 8.33 % | | 1 | 8.33 % | | 5 | C C D C | NK4O | 1 | 8.33 % | | 1 | 8.33 % | | 6 | C D C | W4R | 1 | 8.33 % | | 1 | 8.33 % | |
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