| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AA1K | 154 | 41.62 % | | 194 | 44.70 % | | 2 | C C D C C | AB3CX | 75 | 20.27 % | | 82 | 18.89 % | | 3 | C D C C | E7CW | 47 | 12.70 % | | 53 | 12.21 % | | 4 | C C D C C C | DH8BQA | 35 | 9.46 % | | 35 | 8.06 % | | 5 | C D C C C | F5MUX | 15 | 4.05 % | | 17 | 3.92 % | | 6 | C D D C | A44A | 14 | 3.78 % | | 17 | 3.92 % | | 7 | C D C | B4T | 10 | 2.70 % | | 13 | 3.00 % | | 8 | D C D C | 3B8M | 7 | 1.89 % | | 8 | 1.84 % | | 9 | D C D C C | 3V8SS | 7 | 1.89 % | | 9 | 2.07 % | | 10 | D C / C C D C C | 5B/RN3QO | 1 | 0.27 % | | 1 | 0.23 % | | 11 | D C D C C C | 9M2SAF | 1 | 0.27 % | | 1 | 0.23 % | | 12 | C C D / C C D C C | IH9/OK6RA | 1 | 0.27 % | | 1 | 0.23 % | | 13 | C C D D C | LX75V | 1 | 0.27 % | | 1 | 0.23 % | | 14 | C D C C / D | R8FF/8 | 1 | 0.27 % | | 1 | 0.23 % | | 15 | C D D C C | S52AW | 1 | 0.27 % | | 1 | 0.23 % | |
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