| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0GOB | 64 | 31.68 % | | 64 | 31.37 % | | 2 | C D C C | K4CQ | 49 | 24.26 % | | 50 | 24.51 % | | 3 | C C D C C C | AB8IRC | 43 | 21.29 % | | 43 | 21.08 % | | 4 | C C D C C | AA3YW | 18 | 8.91 % | | 19 | 9.31 % | | 5 | C D C | K1R | 12 | 5.94 % | | 12 | 5.88 % | | 6 | C C D C | KT5C | 12 | 5.94 % | | 12 | 5.88 % | | 7 | C D D C C C | K38CEW | 1 | 0.50 % | | 1 | 0.49 % | | 8 | C C D D D C | KG400Z | 1 | 0.50 % | | 1 | 0.49 % | | 9 | C C C C D | NJJC0 | 1 | 0.50 % | | 1 | 0.49 % | | 10 | C D C C D | W8CS0 | 1 | 0.50 % | | 1 | 0.49 % | |
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