| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AA3B | 42 | 31.34 % | | 46 | 31.29 % | | 2 | C C D C C | CR3DX | 32 | 23.88 % | | 34 | 23.13 % | | 3 | C C D C C C | CS5CRE | 27 | 20.15 % | | 31 | 21.09 % | | 4 | C D C C | K2ZW | 17 | 12.69 % | | 19 | 12.93 % | | 5 | C D C C C | F4DVX | 8 | 5.97 % | | 9 | 6.12 % | | 6 | C D C | G8X | 2 | 1.49 % | | 2 | 1.36 % | | 7 | D C D C | 4U1A | 2 | 1.49 % | | 2 | 1.36 % | | 8 | C C D / C C D C C C | CT7/PA3GCU | 1 | 0.75 % | | 1 | 0.68 % | | 9 | C D D C C | C37NL | 1 | 0.75 % | | 1 | 0.68 % | | 10 | D C D C C | 4Z5FI | 1 | 0.75 % | | 1 | 0.68 % | | 11 | C C D D C | OG66X | 1 | 0.75 % | | 1 | 0.68 % | |
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