| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA0AI | 983 | 30.70 % | | 1515 | 30.17 % | | 2 | C C D C C C | BD0AAI | 798 | 24.92 % | | 1088 | 21.66 % | | 3 | C C D C | AA1K | 595 | 18.58 % | | 1165 | 23.20 % | | 4 | C D C C | B4ZA | 403 | 12.59 % | | 636 | 12.66 % | | 5 | C D C C C | F1EBN | 235 | 7.34 % | | 316 | 6.29 % | | 6 | C D D C | E72U | 38 | 1.19 % | | 62 | 1.23 % | | 7 | C D D C C | A45XR | 35 | 1.09 % | | 54 | 1.08 % | | 8 | D C D C C | 3B9HA | 30 | 0.94 % | | 41 | 0.82 % | | 9 | C D C | B1Z | 28 | 0.87 % | | 55 | 1.10 % | | 10 | D C D C | 3Z1K | 22 | 0.69 % | | 40 | 0.80 % | | 11 | C C D C C / C C C | EA1GT/QRP | 3 | 0.09 % | | 4 | 0.08 % | | 12 | C C D C C C / D | IZ8JFL/1 | 3 | 0.09 % | | 5 | 0.10 % | | 13 | C C / C C D C C | YO/OM6TY | 3 | 0.09 % | | 3 | 0.06 % | | 14 | D C D C C C | 2E0CVN | 2 | 0.06 % | | 3 | 0.06 % | | 15 | C C D D C C C C | DK65DARC | 2 | 0.06 % | | 3 | 0.06 % | | 16 | C C D / C D C C | DU1/R7KW | 2 | 0.06 % | | 2 | 0.04 % | | 17 | C D D C C C | S57MPU | 2 | 0.06 % | | 6 | 0.12 % | | 18 | C D C C C / C | F5TUG/P | 2 | 0.06 % | | 2 | 0.04 % | | 19 | C / C C D C C | F/OM2ZA | 1 | 0.03 % | | 1 | 0.02 % | | 20 | C / C D D C | F/E72T | 1 | 0.03 % | | 1 | 0.02 % | | 21 | C C / C D C C C | FY/F5HRY | 1 | 0.03 % | | 1 | 0.02 % | | 22 | C D D D C C C C | E790IARU | 1 | 0.03 % | | 1 | 0.02 % | | 23 | C D C C / C | F3JP/P | 1 | 0.03 % | | 1 | 0.02 % | | 24 | C D C C / C C D | N2WQ/VE3 | 1 | 0.03 % | | 2 | 0.04 % | | 25 | C C D D C | OG55W | 1 | 0.03 % | | 1 | 0.02 % | | 26 | C C D C C C C | DK0WRTC | 1 | 0.03 % | | 2 | 0.04 % | | 27 | C C D / C C D C C | PJ6/OH1VR | 1 | 0.03 % | | 1 | 0.02 % | | 28 | C C D C C / D | RA1ZZ/3 | 1 | 0.03 % | | 1 | 0.02 % | | 29 | C C D C / D | RT9K/7 | 1 | 0.03 % | | 3 | 0.06 % | | 30 | C C D C C / C | RV6AA/P | 1 | 0.03 % | | 1 | 0.02 % | | 31 | C D / C D C C | J6/K9AW | 1 | 0.03 % | | 1 | 0.02 % | | 32 | C C D C / C D C C | UF6V/R6CZ | 1 | 0.03 % | | 1 | 0.02 % | | 33 | C D C C / D | W9OA/9 | 1 | 0.03 % | | 2 | 0.04 % | | 34 | C C D D D D C C C C C C OM2015TITANIC | 1 | 0.03 % | | 2 | 0.04 % | | |
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