| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0EPC | 14 | 35.00 % | | 14 | 34.15 % | | 2 | C D C C | K5FX | 11 | 27.50 % | | 12 | 29.27 % | | 3 | C C D C C C | KB0VAC | 6 | 15.00 % | | 6 | 14.63 % | | 4 | C C D C C | AB5UE | 4 | 10.00 % | | 4 | 9.76 % | | 5 | C C D C | KC0M | 3 | 7.50 % | | 3 | 7.32 % | | 6 | C D C | W3M | 2 | 5.00 % | | 2 | 4.88 % | |
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