| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AA2A | 530 | 28.73 % | | 665 | 30.23 % | | 2 | C C D C C | AA4CF | 529 | 28.67 % | | 627 | 28.50 % | | 3 | C C D C C C | BD1IIJ | 361 | 19.57 % | | 427 | 19.41 % | | 4 | C D C C | D1DX | 142 | 7.70 % | | 166 | 7.55 % | | 5 | C D C C C | F1AKK | 125 | 6.78 % | | 136 | 6.18 % | | 6 | C D D C | E70T | 33 | 1.79 % | | 40 | 1.82 % | | 7 | C D C | C4W | 25 | 1.36 % | | 27 | 1.23 % | | 8 | D C D C | 3E3E | 19 | 1.03 % | | 24 | 1.09 % | | 9 | D C D C C | 3V8SS | 18 | 0.98 % | | 20 | 0.91 % | | 10 | C D D C C | A61EK | 12 | 0.65 % | | 12 | 0.55 % | | 11 | C C D D C | EI20C | 7 | 0.38 % | | 11 | 0.50 % | | 12 | C C D D C C C | DL50IFM | 7 | 0.38 % | | 7 | 0.32 % | | 13 | D C D C C C | 2E0CVN | 7 | 0.38 % | | 7 | 0.32 % | | 14 | C C D D D C C | DQ750KL | 4 | 0.22 % | | 4 | 0.18 % | | 15 | C C D D C C | LZ75VP | 3 | 0.16 % | | 3 | 0.14 % | | 16 | C C D D C C C C | PC75FREE | 2 | 0.11 % | | 2 | 0.09 % | | 17 | C C D C C C / D | RA4LBS/3 | 2 | 0.11 % | | 2 | 0.09 % | | 18 | C C D / C D C C | CT7/K9PM | 1 | 0.05 % | | 1 | 0.05 % | | 19 | C C D D D C C C | DL100BKW | 1 | 0.05 % | | 1 | 0.05 % | | 20 | D C D C C C / D | 8J1ITU/1 | 1 | 0.05 % | | 1 | 0.05 % | | 21 | C C D C / C C C | IR9R/QRP | 1 | 0.05 % | | 1 | 0.05 % | | 22 | C C D C C C / C C C | IZ3QCH/QRP | 1 | 0.05 % | | 1 | 0.05 % | | 23 | C C / C D C C | EW/R3XA | 1 | 0.05 % | | 1 | 0.05 % | | 24 | C D D C C C | E24NQN | 1 | 0.05 % | | 1 | 0.05 % | | 25 | C D C D | M5D4 | 1 | 0.05 % | | 1 | 0.05 % | | 26 | C C D C C C C | OH5STAY | 1 | 0.05 % | | 1 | 0.05 % | | 27 | C C D C C C C C C C C | OH5STAYHOME | 1 | 0.05 % | | 1 | 0.05 % | | 28 | C C D C C / C C C | DJ3DQ/QRP | 1 | 0.05 % | | 1 | 0.05 % | | 29 | C C D / C D C C C | PJ4/K4BAI | 1 | 0.05 % | | 1 | 0.05 % | | 30 | C C D C C / C C | RA0LQ/MM | 1 | 0.05 % | | 1 | 0.05 % | | 31 | C C D D D C | LY175Z | 1 | 0.05 % | | 1 | 0.05 % | | 32 | C D D D D C | S5400J | 1 | 0.05 % | | 1 | 0.05 % | | 33 | C C D C C C / C | UR5GAW/P | 1 | 0.05 % | | 1 | 0.05 % | | 34 | C D / C C D C C | W1/PY1MX | 1 | 0.05 % | | 1 | 0.05 % | | 35 | C C D / C C D C C C | ZP6/LU8EOT | 1 | 0.05 % | | 1 | 0.05 % | | 36 | C C D C / D | ZR2A/4 | 1 | 0.05 % | | 2 | 0.09 % | |
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