| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0GXI | 16 | 30.77 % | | 16 | 30.77 % | | 2 | C D C C | K3MZ | 14 | 26.92 % | | 14 | 26.92 % | | 3 | C C D C C C | KC0NRA | 9 | 17.31 % | | 9 | 17.31 % | | 4 | C C D C C | AA3YW | 7 | 13.46 % | | 7 | 13.46 % | | 5 | C C D C | KA5M | 3 | 5.77 % | | 3 | 5.77 % | | 6 | C D C | K2J | 2 | 3.85 % | | 2 | 3.85 % | | 7 | C D C C C C | W5ZUNW | 1 | 1.92 % | | 1 | 1.92 % | |
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