| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0ATS | 231 | 38.89 % | | 267 | 39.91 % | | 2 | C D C C | K0RV | 128 | 21.55 % | | 146 | 21.82 % | | 3 | C C D C C C | AB8IRC | 109 | 18.35 % | | 115 | 17.19 % | | 4 | C C D C C | AA3YW | 49 | 8.25 % | | 56 | 8.37 % | | 5 | C C D C | AA0A | 42 | 7.07 % | | 48 | 7.17 % | | 6 | C D C | K0N | 30 | 5.05 % | | 32 | 4.78 % | | 7 | C D D C C C | K38CEW | 1 | 0.17 % | | 1 | 0.15 % | | 8 | C C D D D C | KG400Z | 1 | 0.17 % | | 1 | 0.15 % | | 9 | C D D C | N05V | 1 | 0.17 % | | 1 | 0.15 % | | 10 | C C C C D | NJJC0 | 1 | 0.17 % | | 1 | 0.15 % | | 11 | C D C C D | W8CS0 | 1 | 0.17 % | | 1 | 0.15 % | |
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