| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | E7CW | 388 | 32.09 % | | 392 | 31.82 % | | 2 | C C D C | AA1K | 262 | 21.67 % | | 265 | 21.51 % | | 3 | C C D C C | AA0RS | 214 | 17.70 % | | 218 | 17.69 % | | 4 | C D C C C | C6AEI | 178 | 14.72 % | | 185 | 15.02 % | | 5 | C C D C C C | DF1LON | 125 | 10.34 % | | 129 | 10.47 % | | 6 | C D D C | J35X | 13 | 1.08 % | | 13 | 1.06 % | | 7 | C D C | G3P | 7 | 0.58 % | | 7 | 0.57 % | | 8 | D C D C | 4X2M | 5 | 0.41 % | | 6 | 0.49 % | | 9 | D C D C C | 4U1WB | 3 | 0.25 % | | 3 | 0.24 % | | 10 | C D D C C | J68HZ | 3 | 0.25 % | | 3 | 0.24 % | | 11 | C C D / C D D C C | CT8/S51TA | 1 | 0.08 % | | 1 | 0.08 % | | 12 | C C D / C D D C | IG9/S59A | 1 | 0.08 % | | 1 | 0.08 % | | 13 | C C D / C D C C | HR5/F2JD | 1 | 0.08 % | | 1 | 0.08 % | | 14 | C C D D C C C | EM30UCC | 1 | 0.08 % | | 1 | 0.08 % | | 15 | C D C C / D | K2ZR/4 | 1 | 0.08 % | | 1 | 0.08 % | | 16 | C D C C C / D | K8RGI/4 | 1 | 0.08 % | | 1 | 0.08 % | | 17 | C C D C C C / D | KB1EFS/2 | 1 | 0.08 % | | 1 | 0.08 % | | 18 | C C D C C / C D | KH6KG/W5 | 1 | 0.08 % | | 1 | 0.08 % | | 19 | C C D C / C D | KH7X/W7 | 1 | 0.08 % | | 1 | 0.08 % | | 20 | C C D D C | LX20I | 1 | 0.08 % | | 1 | 0.08 % | | 21 | C C D C / D | NN7A/1 | 1 | 0.08 % | | 1 | 0.08 % | |
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