| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0AD | 268 | 44.52 % | | 270 | 44.33 % | | 2 | C C D C | AA3S | 102 | 16.94 % | | 102 | 16.75 % | | 3 | C D C C C | K0ACP | 96 | 15.95 % | | 96 | 15.76 % | | 4 | C C D C C | AA0FO | 79 | 13.12 % | | 80 | 13.14 % | | 5 | C C D C C C | KA0PQW | 55 | 9.14 % | | 55 | 9.03 % | | 6 | C C D C C C / C C D | KI6RRN/KL7 | 1 | 0.17 % | | 1 | 0.16 % | | 7 | C C D C / D | NE8O/4 | 1 | 0.17 % | | 1 | 0.16 % | |
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