| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0RV | 99 | 42.49 % | | 103 | 42.56 % | | 2 | C D C C C | K0ANT | 72 | 30.90 % | | 74 | 30.58 % | | 3 | C C D C | AA3B | 24 | 10.30 % | | 25 | 10.33 % | | 4 | C C D C C | AA4NC | 23 | 9.87 % | | 25 | 10.33 % | | 5 | C D C | K7T | 7 | 3.00 % | | 7 | 2.89 % | | 6 | C C D C C C | KD0VHD | 6 | 2.58 % | | 6 | 2.48 % | | 7 | C D D C C | K04OL | 2 | 0.86 % | | 2 | 0.83 % | |
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