| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K4GK | 3 | 23.08 % | | 3 | 21.43 % | | 2 | C C D C C C | KI4MZC | 3 | 23.08 % | | 3 | 21.43 % | | 3 | C D C | N4A | 3 | 23.08 % | | 4 | 28.57 % | | 4 | C D C C C | N1ADM | 2 | 15.38 % | | 2 | 14.29 % | | 5 | C C D C | KN4Y | 2 | 15.38 % | | 2 | 14.29 % | |
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