| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0RV | 72 | 45.86 % | | 72 | 45.86 % | | 2 | C D C C C | K0ANT | 44 | 28.03 % | | 44 | 28.03 % | | 3 | C C D C C | AA8BV | 15 | 9.55 % | | 15 | 9.55 % | | 4 | C C D C | AA3S | 12 | 7.64 % | | 12 | 7.64 % | | 5 | C C D C C C | AB8IRC | 10 | 6.37 % | | 10 | 6.37 % | | 6 | C D C | K9E | 4 | 2.55 % | | 4 | 2.55 % | |
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