| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0IZI | 78 | 34.51 % | | 82 | 31.78 % | | 2 | C D C C | K1BZ | 52 | 23.01 % | | 55 | 21.32 % | | 3 | C C D C C C | KA2MGE | 43 | 19.03 % | | 43 | 16.67 % | | 4 | C C D C C | AA5UN | 25 | 11.06 % | | 25 | 9.69 % | | 5 | C C D C | AJ4A | 19 | 8.41 % | | 21 | 8.14 % | | 6 | C D C | K4W | 9 | 3.98 % | | 10 | 3.88 % | |
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