| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0IIT | 98 | 40.50 % | | 106 | 40.61 % | | 2 | C D C C | K1IP | 87 | 35.95 % | | 94 | 36.02 % | | 3 | C C D C | AA3B | 23 | 9.50 % | | 25 | 9.58 % | | 4 | C C D C C | AA2EQ | 16 | 6.61 % | | 17 | 6.51 % | | 5 | C D C | K0J | 9 | 3.72 % | | 9 | 3.45 % | | 6 | C C D C C C | KA5HWH | 9 | 3.72 % | | 10 | 3.83 % | |
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