| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0AD | 282 | 41.96 % | | 532 | 45.82 % | | 2 | C C D C | AA2Q | 130 | 19.35 % | | 231 | 19.90 % | | 3 | C D C C C | K0GUZ | 102 | 15.18 % | | 154 | 13.26 % | | 4 | C C D C C | AA0AW | 87 | 12.95 % | | 142 | 12.23 % | | 5 | C C D C C C | JK1HIY | 59 | 8.78 % | | 80 | 6.89 % | | 6 | C D C | K4O | 7 | 1.04 % | | 10 | 0.86 % | | 7 | C C D C / D | AI0Y/9 | 1 | 0.15 % | | 3 | 0.26 % | | 8 | C D C C / C C D | K3WA/KP4 | 1 | 0.15 % | | 3 | 0.26 % | | 9 | C D C C / D | K2ZR/4 | 1 | 0.15 % | | 1 | 0.09 % | | 10 | C D C C C / D | K8RGI/4 | 1 | 0.15 % | | 1 | 0.09 % | | 11 | C C D / C C D C | VP5/KM3T | 1 | 0.15 % | | 4 | 0.34 % | |
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