| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AC4CA | 173 | 32.70 % | | 207 | 33.07 % | | 2 | C C D C C C | BD0AAI | 129 | 24.39 % | | 147 | 23.48 % | | 3 | C C D C | DU3T | 105 | 19.85 % | | 119 | 19.01 % | | 4 | C D C C | F5FJ | 63 | 11.91 % | | 82 | 13.10 % | | 5 | C D C C C | D1DNR | 20 | 3.78 % | | 25 | 3.99 % | | 6 | D C D C C | 4O4SM | 10 | 1.89 % | | 10 | 1.60 % | | 7 | C D D C C | A31MM | 9 | 1.70 % | | 11 | 1.76 % | | 8 | D C D C | 4E1A | 4 | 0.76 % | | 4 | 0.64 % | | 9 | C D D C | S57K | 3 | 0.57 % | | 4 | 0.64 % | | 10 | C D C | E2A | 2 | 0.38 % | | 4 | 0.64 % | | 11 | C D D C C C | E21YDP | 2 | 0.38 % | | 2 | 0.32 % | | 12 | C C D C C C / C | UA0CID/P | 2 | 0.38 % | | 2 | 0.32 % | | 13 | D C D C C C | 9M2ZAK | 1 | 0.19 % | | 1 | 0.16 % | | 14 | C C D C C / C C D | AH0CO/KL7 | 1 | 0.19 % | | 1 | 0.16 % | | 15 | C C D C / C C D | KH0R/KH2 | 1 | 0.19 % | | 2 | 0.32 % | | 16 | D C D / C C D C C C | 9M2/JE1SCJ | 1 | 0.19 % | | 1 | 0.16 % | | 17 | C C D / C C D C C | SV2/RW3AL | 1 | 0.19 % | | 1 | 0.16 % | | 18 | C C D C C / D | AB5ZA/7 | 1 | 0.19 % | | 1 | 0.16 % | | 19 | C C D D C | YR32A | 1 | 0.19 % | | 2 | 0.32 % | |
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