| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0AD | 498 | 46.37 % | | 924 | 49.28 % | | 2 | C D C C C | K0EOU | 184 | 17.13 % | | 280 | 14.93 % | | 3 | C C D C | AA0O | 180 | 16.76 % | | 329 | 17.55 % | | 4 | C C D C C | AA0AI | 124 | 11.55 % | | 216 | 11.52 % | | 5 | C C D C C C | KA1IOR | 86 | 8.01 % | | 124 | 6.61 % | | 6 | D C D C C | 4U1WB | 1 | 0.09 % | | 1 | 0.05 % | | 7 | C D / C C D C | W8/WP3C | 1 | 0.09 % | | 1 | 0.05 % | |
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