| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0AP | 138 | 27.66 % | | 252 | 30.62 % | | 2 | C D C C C | F4BHK | 104 | 20.84 % | | 157 | 19.08 % | | 3 | C C D C | AA3S | 94 | 18.84 % | | 160 | 19.44 % | | 4 | C C D C C | AA0FO | 83 | 16.63 % | | 128 | 15.55 % | | 5 | C C D C C C | KA2MGE | 77 | 15.43 % | | 122 | 14.82 % | | 6 | C C D C C C / D | KB6QPI/4 | 1 | 0.20 % | | 1 | 0.12 % | | 7 | C C D / C D C C C | KP4/K6DTT | 1 | 0.20 % | | 2 | 0.24 % | | 8 | C D C C / D | N5AW/0 | 1 | 0.20 % | | 1 | 0.12 % | |
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