| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CT2HEX | 80 | 60.61 % | | 92 | 63.01 % | | 2 | C C D C C | DC0MM | 25 | 18.94 % | | 27 | 18.49 % | | 3 | C D C C C | F4JGI | 14 | 10.61 % | | 14 | 9.59 % | | 4 | C D C C | R3HD | 3 | 2.27 % | | 3 | 2.05 % | | 5 | C C D C | OO0Q | 3 | 2.27 % | | 3 | 2.05 % | | 6 | D C D C C C | 2E0KKH | 2 | 1.52 % | | 2 | 1.37 % | | 7 | D C D C C | 4O4DB | 2 | 1.52 % | | 2 | 1.37 % | | 8 | C D D C | E77O | 1 | 0.76 % | | 1 | 0.68 % | | 9 | C C D C C C / C | OE1OGU/P | 1 | 0.76 % | | 1 | 0.68 % | | 10 | C C D C C C / C C C | PA5BAS/QRP | 1 | 0.76 % | | 1 | 0.68 % | |
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