| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA4AK | 687 | 31.56 % | | 958 | 32.42 % | | 2 | C C D C C C | BD1IIJ | 658 | 30.23 % | | 833 | 28.19 % | | 3 | C C D C | AA3B | 430 | 19.75 % | | 645 | 21.83 % | | 4 | C D C C | D3AA | 129 | 5.93 % | | 159 | 5.38 % | | 5 | C D C C C | F4GBW | 88 | 4.04 % | | 102 | 3.45 % | | 6 | C D D C C | A65BP | 29 | 1.33 % | | 41 | 1.39 % | | 7 | C D D C | A61K | 28 | 1.29 % | | 37 | 1.25 % | | 8 | D C D C C | 3A2MW | 22 | 1.01 % | | 32 | 1.08 % | | 9 | D C D C | 4K4K | 19 | 0.87 % | | 29 | 0.98 % | | 10 | C D C | B1C | 13 | 0.60 % | | 18 | 0.61 % | | 11 | D C D C C C | 2E0ZAI | 10 | 0.46 % | | 13 | 0.44 % | | 12 | C C D C C C / D | DS4EOI/2 | 6 | 0.28 % | | 6 | 0.20 % | | 13 | C C D D C | HA30S | 6 | 0.28 % | | 10 | 0.34 % | | 14 | C C D D C C | LZ49FJ | 5 | 0.23 % | | 8 | 0.27 % | | 15 | C C D D C C C | DK75FOC | 5 | 0.23 % | | 5 | 0.17 % | | 16 | C C / C C D C C | DL/SP3CW | 4 | 0.18 % | | 4 | 0.14 % | | 17 | C C D C C C / C C C |
EA7AAW/QRP | 3 | 0.14 % | | 3 | 0.10 % | | 18 | C C D / C C D C C | CT9/OM8AA | 3 | 0.14 % | | 4 | 0.14 % | | 19 | C D D C C C | J07KMB | 3 | 0.14 % | | 4 | 0.14 % | | 20 | C C D C C / D | EU1DZ/6 | 3 | 0.14 % | | 7 | 0.24 % | | 21 | D C D D C | 9A33P | 2 | 0.09 % | | 2 | 0.07 % | | 22 | C C D C C / C C C | UY1AW/QRP | 2 | 0.09 % | | 4 | 0.14 % | | 23 | C C / C C D C C C | DL/HB9AYZ | 2 | 0.09 % | | 3 | 0.10 % | | 24 | C C / C D C C | EI/W5GN | 2 | 0.09 % | | 3 | 0.10 % | | 25 | C C D C C / C | DJ2MX/P | 2 | 0.09 % | | 3 | 0.10 % | | 26 | C C D C C C C | DK7HFOC | 1 | 0.05 % | | 1 | 0.03 % | | 27 | C C D / C C D C C C / C ' | EA6/OK2BFN/P | 1 | 0.05 % | | 1 | 0.03 % | | 28 | C / C C D C C | F/ON5JT | 1 | 0.05 % | | 1 | 0.03 % | | 29 | D C C D C C | 4KT5FO | 1 | 0.05 % | | 1 | 0.03 % | | 30 | D C D D C C | 9A28EU | 1 | 0.05 % | | 1 | 0.03 % | | 31 | C C D C C C / C | DL7USW/P | 1 | 0.05 % | | 4 | 0.14 % | | 32 | C C D D D C | HF700S | 1 | 0.05 % | | 2 | 0.07 % | | 33 | C D / C D D C | I0/S53R | 1 | 0.05 % | | 1 | 0.03 % | | 34 | C C D / C C D C C C |
IK5/DL5RDP | 1 | 0.05 % | | 1 | 0.03 % | | 35 | C C D C / D | EE7L/1 | 1 | 0.05 % | | 1 | 0.03 % | | 36 | C C D D D D C C | LZ2013KM | 1 | 0.05 % | | 2 | 0.07 % | | 37 | C D / C C D C C C | A6/DL9WVM | 1 | 0.05 % | | 1 | 0.03 % | | 38 | C D D D C C | S503EO | 1 | 0.05 % | | 2 | 0.07 % | | 39 | C / C D C C | F/W1NN | 1 | 0.05 % | | 1 | 0.03 % | | 40 | C C D / C C D C | YS1/NP4J | 1 | 0.05 % | | 1 | 0.03 % | | 41 | C C D C / C C C | YU0W/QRP | 1 | 0.05 % | | 1 | 0.03 % | |
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