| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | DK1A | 58 | 30.21 % | | 74 | 29.25 % | | 2 | C C D C C | CR5CW | 47 | 24.48 % | | 62 | 24.51 % | | 3 | C C D C C C | DL1ROT | 28 | 14.58 % | | 30 | 11.86 % | | 4 | C D C C C | F5NLX | 7 | 3.65 % | | 7 | 2.77 % | | 5 | C D C C | G3CO | 6 | 3.13 % | | 10 | 3.95 % | | 6 | C C D C C / C | DF0WR/P | 4 | 2.08 % | | 5 | 1.98 % | | 7 | C D C | G5W | 4 | 2.08 % | | 6 | 2.37 % | | 8 | C C D / C C D C C | IA5/OM2ZZ | 4 | 2.08 % | | 5 | 1.98 % | | 9 | C C / C C D C C | LA/OK3EE | 4 | 2.08 % | | 6 | 2.37 % | | 10 | C C D C C C / C | GM3WIJ/P | 3 | 1.56 % | | 5 | 1.98 % | | 11 | C C / C C D C C C | CT/DL6IAK | 3 | 1.56 % | | 5 | 1.98 % | | 12 | C C D / C C D C C C | IF9/IT9PPG | 3 | 1.56 % | | 3 | 1.19 % | | 13 | C D D C | J49A | 2 | 1.04 % | | 3 | 1.19 % | | 14 | C D D C C | E77EA | 2 | 1.04 % | | 3 | 1.19 % | | 15 | D C D C / C | 9A2L/P | 2 | 1.04 % | | 5 | 1.98 % | | 16 | C C D C / C | DF5A/P | 2 | 1.04 % | | 4 | 1.58 % | | 17 | C C D C / D | NY3A/3 | 2 | 1.04 % | | 4 | 1.58 % | | 18 | D C D C C C | 9A1BST | 2 | 1.04 % | | 2 | 0.79 % | | 19 | D C / C C D C C | 9A/OM8AA | 1 | 0.52 % | | 2 | 0.79 % | | 20 | D C D C | 4O3A | 1 | 0.52 % | | 2 | 0.79 % | | 21 | C D C C C / C | G4ALE/P | 1 | 0.52 % | | 1 | 0.40 % | | 22 | C C / C C D C | LA/OL7X | 1 | 0.52 % | | 1 | 0.40 % | | 23 | C C D D D C | LM450C | 1 | 0.52 % | | 1 | 0.40 % | | 24 | D C D C C | 9H3MN | 1 | 0.52 % | | 2 | 0.79 % | | 25 | C C / C C D C C / C | OZ/DL3JJ/P | 1 | 0.52 % | | 2 | 0.79 % | | 26 | C C / C D C C C | OZ/M0WUT | 1 | 0.52 % | | 1 | 0.40 % | | 27 | C C D D C C C | YU73BFG | 1 | 0.52 % | | 2 | 0.79 % | |
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