| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AA1W | 414 | 21.34 % | | 663 | 24.14 % | | 2 | C C D C C | AA0AI | 390 | 20.10 % | | 493 | 17.95 % | | 3 | C D C C | E7CW | 367 | 18.92 % | | 629 | 22.91 % | | 4 | C C D C C C | CO2AME | 343 | 17.68 % | | 396 | 14.42 % | | 5 | C D C C C | F1AGR | 336 | 17.32 % | | 426 | 15.51 % | | 6 | C D D C | A73A | 21 | 1.08 % | | 41 | 1.49 % | | 7 | D C D C | 3G1D | 16 | 0.82 % | | 31 | 1.13 % | | 8 | C D C | D4C | 14 | 0.72 % | | 23 | 0.84 % | | 9 | C D D C C | C37NL | 11 | 0.57 % | | 12 | 0.44 % | | 10 | D C D C C | 0N5UJ | 11 | 0.57 % | | 13 | 0.47 % | | 11 | D C D C C C | 9A1CKH | 2 | 0.10 % | | 3 | 0.11 % | | 12 | D C D D D C | 5J500D | 2 | 0.10 % | | 2 | 0.07 % | | 13 | C C D D C C C | HB90TOC | 2 | 0.10 % | | 3 | 0.11 % | | 14 | C C D / C C D C | HC1/KW8N | 2 | 0.10 % | | 2 | 0.07 % | | 15 | C C D / C D C C | HR9/N3AD | 1 | 0.05 % | | 1 | 0.04 % | | 16 | C D C C / C | K8AH/M | 1 | 0.05 % | | 1 | 0.04 % | | 17 | C C / C C D C C | ON/PD1AT | 1 | 0.05 % | | 1 | 0.04 % | | 18 | C C D D C | OZ11A | 1 | 0.05 % | | 1 | 0.04 % | | 19 | C C D D C C | OZ30EU | 1 | 0.05 % | | 1 | 0.04 % | | 20 | C C D D D C C C | PH100KLM | 1 | 0.05 % | | 1 | 0.04 % | | 21 | C C D / C C D C C | SV9/SV0IG | 1 | 0.05 % | | 1 | 0.04 % | | 22 | C C D / C C D C C C | VE2/IU7KRA | 1 | 0.05 % | | 1 | 0.04 % | | 23 | C D C C C / C | W9ATU/M | 1 | 0.05 % | | 1 | 0.04 % | |
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