| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | BA7LOK | 1094 | 34.66 % | | 1318 | 31.55 % | | 2 | C C D C C | AA0AW | 672 | 21.29 % | | 864 | 20.68 % | | 3 | C C D C | AA0Z | 528 | 16.73 % | | 803 | 19.22 % | | 4 | C D C C C | C6AGU | 428 | 13.56 % | | 561 | 13.43 % | | 5 | C D C C | E7AA | 206 | 6.53 % | | 288 | 6.89 % | | 6 | D C D C C C | 2E0CNL | 40 | 1.27 % | | 54 | 1.29 % | | 7 | D C D C | 3Z0X | 29 | 0.92 % | | 37 | 0.89 % | | 8 | C D C | C4I | 27 | 0.86 % | | 48 | 1.15 % | | 9 | C D D C C | A61BR | 26 | 0.82 % | | 29 | 0.69 % | | 10 | D C D C C | 4U1WB | 25 | 0.79 % | | 31 | 0.74 % | | 11 | C D D C | A44A | 18 | 0.57 % | | 27 | 0.65 % | | 12 | C C D D C C C | DF40BGK | 6 | 0.19 % | | 6 | 0.14 % | | 13 | C C D C C C C | II1WRTC | 5 | 0.16 % | | 6 | 0.14 % | | 14 | C C D D C | OG66X | 5 | 0.16 % | | 5 | 0.12 % | | 15 | C D D C C C | E20XMG | 5 | 0.16 % | | 6 | 0.14 % | | 16 | C D C C C / C | F1DJE/P | 4 | 0.13 % | | 5 | 0.12 % | | 17 | C C D C C C / C | MC0PMT/P | 4 | 0.13 % | | 4 | 0.10 % | | 18 | C C D D C C | HB50SH | 4 | 0.13 % | | 6 | 0.14 % | | 19 | C C D C C C / C C C | IS0AGY/QRP | 3 | 0.10 % | | 3 | 0.07 % | | 20 | C C D D D C | EI100C | 2 | 0.06 % | | 4 | 0.10 % | | 21 | C C / C C D C C C | DL/SP2RBA | 2 | 0.06 % | | 2 | 0.05 % | | 22 | C D C C / D | N3GY/8 | 2 | 0.06 % | | 2 | 0.05 % | | 23 | C C D / C C D C C C | EA7/DL8FCL | 2 | 0.06 % | | 2 | 0.05 % | | 24 | D C / C C D C C | 9H/TA1HZ | 1 | 0.03 % | | 1 | 0.02 % | | 25 | C C D C C / C | DH9DX/P | 1 | 0.03 % | | 1 | 0.02 % | | 26 | D C / C C D C C C | 3A/IK1TTD | 1 | 0.03 % | | 1 | 0.02 % | | 27 | D C D D D D | 3X2021 | 1 | 0.03 % | | 1 | 0.02 % | | 28 | C / C D C C C | F/G8BHB | 1 | 0.03 % | | 1 | 0.02 % | | 29 | C C D D C C C C | DL73AFUG | 1 | 0.03 % | | 1 | 0.02 % | | 30 | D C D D C C C | 4A90QRO | 1 | 0.03 % | | 1 | 0.02 % | | 31 | C C D D C C C C C | DL35EUDXF | 1 | 0.03 % | | 1 | 0.02 % | | 32 | C D / C C D C C C | I3/OE6MBG | 1 | 0.03 % | | 1 | 0.02 % | | 33 | C C D C C / D | BA3GG/4 | 1 | 0.03 % | | 1 | 0.02 % | | 34 | C C D D D C C | DK050BN | 1 | 0.03 % | | 1 | 0.02 % | | 35 | C C D C C / C D | KN4WW/W1 | 1 | 0.03 % | | 1 | 0.02 % | | 36 | C C D / C D C C | HR5/F2JD | 1 | 0.03 % | | 1 | 0.02 % | | 37 | D C D C C C / D | 7K1MAG/2 | 1 | 0.03 % | | 1 | 0.02 % | | 38 | C D C C C / C C C | N5MSY/QRP | 1 | 0.03 % | | 1 | 0.02 % | | 39 | C C D / C C D C | NZ7/KH7X | 1 | 0.03 % | | 1 | 0.02 % | | 40 | C C / C D D C C | DL/E79AA | 1 | 0.03 % | | 1 | 0.02 % | | 41 | C C / C C D C C | SP/UT5UT | 1 | 0.03 % | | 1 | 0.02 % | | 42 | C C D C C / C C C | YU1LM/QRP | 1 | 0.03 % | | 2 | 0.05 % | |
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