| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | EI8BLB | 86 | 35.54 % | | 86 | 33.99 % | | 2 | C D C C C | K0DSL | 81 | 33.47 % | | 82 | 32.41 % | | 3 | C C D C C | AA8WZ | 25 | 10.33 % | | 26 | 10.28 % | | 4 | C D C C | K0AD | 25 | 10.33 % | | 25 | 9.88 % | | 5 | C C D C | AA1N | 20 | 8.26 % | | 20 | 7.91 % | | 6 | C D C | K5Y | 1 | 0.41 % | | 1 | 0.40 % | | 7 | C C D C C C / C C | KC3ZTC/AG | 1 | 0.41 % | | 1 | 0.40 % | | 8 | C C D D C C | OE45NO | 1 | 0.41 % | | 1 | 0.40 % | | 9 | C C D C C C / C | WA5DSS/M | 1 | 0.41 % | | 1 | 0.40 % | | 10 | C C D C / C | WW5X/M | 1 | 0.41 % | | 1 | 0.40 % | |
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