| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | F5NZY | 77 | 27.40 % | | 117 | 24.27 % | | 2 | C D C C | F3OA | 72 | 25.62 % | | 152 | 31.54 % | | 3 | C C D C C | AD5XI | 57 | 20.28 % | | 88 | 18.26 % | | 4 | C C D C C C | DJ1YFK | 38 | 13.52 % | | 58 | 12.03 % | | 5 | C C D C | AA3B | 21 | 7.47 % | | 43 | 8.92 % | | 6 | D C D C C | 4X4DK | 4 | 1.42 % | | 6 | 1.24 % | | 7 | C D D C C | A45XR | 3 | 1.07 % | | 5 | 1.04 % | | 8 | C D C C / D | K2ZR/4 | 2 | 0.71 % | | 3 | 0.62 % | | 9 | C D C C / C | N9RD/M | 2 | 0.71 % | | 2 | 0.41 % | | 10 | D C D C C C | 5B4AGN | 1 | 0.36 % | | 3 | 0.62 % | | 11 | C C / C D D C C | HA/S57WJ | 1 | 0.36 % | | 2 | 0.41 % | | 12 | D C D C | 5Q2A | 1 | 0.36 % | | 1 | 0.21 % | | 13 | C C D C / C C C | AI2Q/QRP | 1 | 0.36 % | | 1 | 0.21 % | | 14 | C C D / C D C C | TI5/N3KS | 1 | 0.36 % | | 1 | 0.21 % | |
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