| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0KB | 75 | 25.00 % | | 77 | 24.60 % | | 2 | C D C C C | K0JJR | 74 | 24.67 % | | 79 | 25.24 % | | 3 | C C D C C | AA0AW | 51 | 17.00 % | | 51 | 16.29 % | | 4 | C C D C | AB0S | 49 | 16.33 % | | 54 | 17.25 % | | 5 | C C D C C C | KA2AEY | 44 | 14.67 % | | 45 | 14.38 % | | 6 | C C / C C D C | FP/KV1J | 1 | 0.33 % | | 1 | 0.32 % | | 7 | C D C C / D | K2AL/1 | 1 | 0.33 % | | 1 | 0.32 % | | 8 | D C D C C | 4U1WB | 1 | 0.33 % | | 1 | 0.32 % | | 9 | C C D C / D | NA6O/7 | 1 | 0.33 % | | 1 | 0.32 % | | 10 | C C D C C / C C D | PT7BL/VE3 | 1 | 0.33 % | | 1 | 0.32 % | | 11 | C C C D C C | VAC0MN | 1 | 0.33 % | | 1 | 0.32 % | | 12 | C D C C C / D | W0EAR/9 | 1 | 0.33 % | | 1 | 0.32 % | |
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