| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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| 1 | C D C C | F5II | 461 | 29.86 % | | 708 | 32.14 % | | | 2 | C C D C | AB0S | 364 | 23.58 % | | 574 | 26.06 % | | | 3 | C C D C C | AB0RX | 275 | 17.81 % | | 365 | 16.57 % | | | 4 | C D C C C | F1EBN | 185 | 11.98 % | | 229 | 10.39 % | | | 5 | C C D C C C | CF3CCO | 176 | 11.40 % | | 204 | 9.26 % | | | 6 | C D D C | E74Y | 26 | 1.68 % | | 37 | 1.68 % | | | 7 | C D C | E7C | 13 | 0.84 % | | 22 | 1.00 % | | | 8 | D C D C | 4O3A | 9 | 0.58 % | | 18 | 0.82 % | | | 9 | D C D C C | 4A5XX | 9 | 0.58 % | | 10 | 0.45 % | | | 10 | C D D C C | A71BX | 9 | 0.58 % | | 10 | 0.45 % | | | 11 | C D D C C C | E51RAT | 3 | 0.19 % | | 5 | 0.23 % | | | 12 | C D C C / D | W1AW/3 | 2 | 0.13 % | | 4 | 0.18 % | | | 13 | C D / C C D C | V4/WJ2O | 2 | 0.13 % | | 2 | 0.09 % | | | 14 | C C D / C D C C | EA8/K1LZ | 1 | 0.06 % | | 1 | 0.05 % | | | 15 | D C / C C D C C | 5B/RN3QO | 1 | 0.06 % | | 1 | 0.05 % | | | 16 | C C D / C C D C | EA8/RA1A | 1 | 0.06 % | | 1 | 0.05 % | | | 17 | D C D D C C C | 3Z50AYP | 1 | 0.06 % | | 1 | 0.05 % | | | 18 | C D / C C D C C C | J6/DL7VOG | 1 | 0.06 % | | 1 | 0.05 % | | | 19 | C D C C D | K7ZV3 | 1 | 0.06 % | | 1 | 0.05 % | | | 20 | C C D C C / C D | NP4IW/W6 | 1 | 0.06 % | | 1 | 0.05 % | | | 21 | D C D / C C D C C | 9Y4/VE3EY | 1 | 0.06 % | | 3 | 0.14 % | | | 22 | C C D C C / D | HC2AO/8 | 1 | 0.06 % | | 4 | 0.18 % | | | 23 | C D C C C / D | W3DQN/5 | 1 | 0.06 % | | 1 | 0.05 % | |
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