| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AA1K | 638 | 29.03 % | | 974 | 31.70 % | | 2 | C C D C C | AA0AW | 496 | 22.57 % | | 650 | 21.15 % | | 3 | C C D C C C | CO8NMN | 380 | 17.29 % | | 496 | 16.14 % | | 4 | C D C C | E7CW | 341 | 15.51 % | | 507 | 16.50 % | | 5 | C D C C C | F4CVQ | 243 | 11.06 % | | 326 | 10.61 % | | 6 | C D D C | A42K | 20 | 0.91 % | | 22 | 0.72 % | | 7 | D C D C C | 3D2AG | 15 | 0.68 % | | 16 | 0.52 % | | 8 | C D D C C | E74SL | 15 | 0.68 % | | 19 | 0.62 % | | 9 | C D C | D4Z | 15 | 0.68 % | | 18 | 0.59 % | | 10 | D C D C | 3Z0X | 11 | 0.50 % | | 14 | 0.46 % | | 11 | C C D D C C | LY73BB | 5 | 0.23 % | | 8 | 0.26 % | | 12 | D C D C C C | 5B4AOW | 2 | 0.09 % | | 2 | 0.07 % | | 13 | C C D C C / C C D | KD2HE/VE3 | 2 | 0.09 % | | 2 | 0.07 % | | 14 | C C D C C / D | AB5ZA/7 | 1 | 0.05 % | | 1 | 0.03 % | | 15 | C C D C / D | AI0Y/9 | 1 | 0.05 % | | 1 | 0.03 % | | 16 | D C D D C C | 9A10FF | 1 | 0.05 % | | 1 | 0.03 % | | 17 | C D C C / C | K2UA/M | 1 | 0.05 % | | 1 | 0.03 % | | 18 | C C D D D C C C | HF100LEM | 1 | 0.05 % | | 1 | 0.03 % | | 19 | C C D C C C / C C | IU1DUB/MM | 1 | 0.05 % | | 1 | 0.03 % | | 20 | C C D D D D C | LZ1340B | 1 | 0.05 % | | 1 | 0.03 % | | 21 | C D C C C / C | M0ORY/P | 1 | 0.05 % | | 1 | 0.03 % | | 22 | C C D D C | OG73X | 1 | 0.05 % | | 2 | 0.07 % | | 23 | C C / C C D C C C | OM/OK1CRM | 1 | 0.05 % | | 1 | 0.03 % | | 24 | C C D D D D C C | SQ1921PS | 1 | 0.05 % | | 1 | 0.03 % | | 25 | C C / C C D C C | TF/KA1IS | 1 | 0.05 % | | 1 | 0.03 % | | 26 | C C D D C C C | VX31IGY | 1 | 0.05 % | | 3 | 0.10 % | | 27 | C D C C C / D | W3ZQN/3 | 1 | 0.05 % | | 2 | 0.07 % | | 28 | C D / C C D C C | W8/LZ2SX | 1 | 0.05 % | | 1 | 0.03 % | |
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