| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | BG8SXC | 1785 | 27.27 % | | 2480 | 22.30 % | | 2 | C C D C C | AA0AI | 1429 | 21.83 % | | 2349 | 21.12 % | | 3 | C D C C C | F1AGR | 1243 | 18.99 % | | 1909 | 17.16 % | | 4 | C C D C | AA0O | 995 | 15.20 % | | 2102 | 18.90 % | | 5 | C D C C | E7CW | 816 | 12.47 % | | 1744 | 15.68 % | | 6 | C D D C | A44A | 45 | 0.69 % | | 105 | 0.94 % | | 7 | D C D C C | 3A2MG | 44 | 0.67 % | | 79 | 0.71 % | | 8 | D C D C | 3G1D | 39 | 0.60 % | | 91 | 0.82 % | | 9 | C D D C C | A45XR | 38 | 0.58 % | | 62 | 0.56 % | | 10 | C D C | C4W | 32 | 0.49 % | | 70 | 0.63 % | | 11 | D C D C C C | 2E0EBM | 20 | 0.31 % | | 30 | 0.27 % | | 12 | C C D D C C C | DR50DIG | 6 | 0.09 % | | 10 | 0.09 % | | 13 | C D D C C C | D68CCC | 5 | 0.08 % | | 8 | 0.07 % | | 14 | C C D C C C / C | DL1CLM/P | 4 | 0.06 % | | 5 | 0.04 % | | 15 | C D C C C / C | F6FVY/P | 3 | 0.05 % | | 5 | 0.04 % | | 16 | C C D / C C D C C | EA6/DK5IR | 3 | 0.05 % | | 4 | 0.04 % | | 17 | C C D C C / C | DH9DX/P | 3 | 0.05 % | | 6 | 0.05 % | | 18 | C C D D C | LG80T | 3 | 0.05 % | | 5 | 0.04 % | | 19 | C C D / C C D C | EA5/LN2G | 3 | 0.05 % | | 11 | 0.10 % | | 20 | C C D / C C D C C C | EA7/DL8FCL | 3 | 0.05 % | | 4 | 0.04 % | | 21 | C C D D D C C C | EI100YXQ | 2 | 0.03 % | | 2 | 0.02 % | | 22 | D C D D D C | 5J500D | 2 | 0.03 % | | 3 | 0.03 % | | 23 | C D C C C / D | K1VSJ/4 | 2 | 0.03 % | | 2 | 0.02 % | | 24 | C C D / C D C C | HR9/N3AD | 2 | 0.03 % | | 8 | 0.07 % | | 25 | C C / C D C C C | FY/F4EPP | 2 | 0.03 % | | 2 | 0.02 % | | 26 | D C D D C C | 3Z15UE | 1 | 0.02 % | | 1 | 0.01 % | | 27 | D C D D C C C | 3Z50DVP | 1 | 0.02 % | | 2 | 0.02 % | | 28 | C C / C D C C | EI/W5GN | 1 | 0.02 % | | 3 | 0.03 % | | 29 | C C D C / C | AJ1G/M | 1 | 0.02 % | | 1 | 0.01 % | | 30 | C C D D D C C | HF100PS | 1 | 0.02 % | | 1 | 0.01 % | | 31 | C D C C C / C D | G7JWR/W4 | 1 | 0.02 % | | 2 | 0.02 % | | 32 | C C D C C C / D | IX1BFL/6 | 1 | 0.02 % | | 2 | 0.02 % | | 33 | D C D C C / C D | 4X1VL/W5 | 1 | 0.02 % | | 1 | 0.01 % | | 34 | C D C / D D | K3K/19 | 1 | 0.02 % | | 1 | 0.01 % | | 35 | C C D C / C D | KH7Y/W6 | 1 | 0.02 % | | 1 | 0.01 % | | 36 | C C D C C / C D | DF4TM/W5 | 1 | 0.02 % | | 1 | 0.01 % | | 37 | C C / C C D C C | ON/PD1AT | 1 | 0.02 % | | 1 | 0.01 % | | 38 | C C D D C C | OZ30EU | 1 | 0.02 % | | 2 | 0.02 % | | 39 | C C D C C C / C C | UW5EJX/MM | 1 | 0.02 % | | 2 | 0.02 % | | 40 | C C D C C / D | VE3ZF/2 | 1 | 0.02 % | | 1 | 0.01 % | | 41 | C D C C / D | W2NQ/7 | 1 | 0.02 % | | 2 | 0.02 % | | 42 | C D C C C / C C D | W5MIL/HR9 | 1 | 0.02 % | | 3 | 0.03 % | |
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