| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0AIZ | 118 | 35.33 % | | 131 | 35.60 % | | 2 | C C D C C C | KA2UFP | 71 | 21.26 % | | 78 | 21.20 % | | 3 | C D C C | K0EA | 70 | 20.96 % | | 78 | 21.20 % | | 4 | C C D C C | AA3YW | 41 | 12.28 % | | 44 | 11.96 % | | 5 | C C D C | AE9U | 26 | 7.78 % | | 28 | 7.61 % | | 6 | C D C | K0B | 8 | 2.40 % | | 9 | 2.45 % | |
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