| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | CF3A | 49 | 48.51 % | | 52 | 49.52 % | | 2 | C C D C C | EA2VE | 23 | 22.77 % | | 24 | 22.86 % | | 3 | C D C C | E7DX | 10 | 9.90 % | | 10 | 9.52 % | | 4 | C C D C C C | CT1BOL | 9 | 8.91 % | | 9 | 8.57 % | | 5 | C D C C C | R2ARR | 3 | 2.97 % | | 3 | 2.86 % | | 6 | C D D C | C37N | 3 | 2.97 % | | 3 | 2.86 % | | 7 | D C D C C | 9K2HN | 1 | 0.99 % | | 1 | 0.95 % | | 8 | D C D C | 9A7A | 1 | 0.99 % | | 1 | 0.95 % | | 9 | D C D D C | 9A50Y | 1 | 0.99 % | | 1 | 0.95 % | | 10 | C D D C C | S52OT | 1 | 0.99 % | | 1 | 0.95 % | |
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