| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AD4TR | 369 | 30.02 % | | 481 | 28.92 % | | 2 | C C D C | AC1U | 351 | 28.56 % | | 545 | 32.77 % | | 3 | C C D C C C | CT1DRB | 239 | 19.45 % | | 282 | 16.96 % | | 4 | C D C C | D1DX | 64 | 5.21 % | | 82 | 4.93 % | | 5 | C D C C C | F1AKK | 59 | 4.80 % | | 61 | 3.67 % | | 6 | C D D C | C44C | 31 | 2.52 % | | 57 | 3.43 % | | 7 | C D D C C | A61ZX | 25 | 2.03 % | | 27 | 1.62 % | | 8 | D C D C C | 4S7AB | 21 | 1.71 % | | 30 | 1.80 % | | 9 | D C D C | 3Z0X | 14 | 1.14 % | | 26 | 1.56 % | | 10 | C D C | G2X | 12 | 0.98 % | | 17 | 1.02 % | | 11 | C C D D C C C | DF13MUC | 8 | 0.65 % | | 13 | 0.78 % | | 12 | C C D D C C | HA01FF | 5 | 0.41 % | | 5 | 0.30 % | | 13 | C C D D C | AM70C | 4 | 0.33 % | | 6 | 0.36 % | | 14 | C C D / C C D C C C | EA5/PA3GCU | 3 | 0.24 % | | 3 | 0.18 % | | 15 | C C / C C D C C C | EA/PA3GCU | 2 | 0.16 % | | 2 | 0.12 % | | 16 | C C D D D C C C | DQ600UNI | 2 | 0.16 % | | 2 | 0.12 % | | 17 | D C D C C C | 2E0CVN | 2 | 0.16 % | | 2 | 0.12 % | | 18 | C C D / C D C C C | CT7/G4ERW | 1 | 0.08 % | | 1 | 0.06 % | | 19 | C / C D D C | F/E72T | 1 | 0.08 % | | 1 | 0.06 % | | 20 | D C / C C D C C | 5B/RN3QO | 1 | 0.08 % | | 1 | 0.06 % | | 21 | C D C C C / C | F5MQW/P | 1 | 0.08 % | | 1 | 0.06 % | | 22 | C C / D C D C C | DL/9A2QP | 1 | 0.08 % | | 1 | 0.06 % | | 23 | C C D C C C / C | DL7USW/P | 1 | 0.08 % | | 2 | 0.12 % | | 24 | C C / C C D C C | HB/RN3QO | 1 | 0.08 % | | 1 | 0.06 % | | 25 | C C D D D C C | HG315VA | 1 | 0.08 % | | 1 | 0.06 % | | 26 | C C / C C D C | LA/LY5G | 1 | 0.08 % | | 1 | 0.06 % | | 27 | C C D D D C | LM450C | 1 | 0.08 % | | 1 | 0.06 % | | 28 | C C D D C C C C | OM83IHWC | 1 | 0.08 % | | 1 | 0.06 % | | 29 | C C D C C / D | RZ9SZ/3 | 1 | 0.08 % | | 1 | 0.06 % | | 30 | C D / C D C C C | S5/G4BJM | 1 | 0.08 % | | 2 | 0.12 % | | 31 | C D D C C D D D | S53MM773 | 1 | 0.08 % | | 1 | 0.06 % | | 32 | C D D D C | S573G | 1 | 0.08 % | | 1 | 0.06 % | | 33 | C D D C C C | S59ABC | 1 | 0.08 % | | 1 | 0.06 % | | 34 | C D C C / D | W1YY/7 | 1 | 0.08 % | | 1 | 0.06 % | | 35 | C C D C C / C C C | YU1LM/QRP | 1 | 0.08 % | | 3 | 0.18 % | |
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