| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AA0O | 521 | 30.03 % | | 747 | 31.36 % | | 2 | C D C C | E7CW | 376 | 21.67 % | | 555 | 23.30 % | | 3 | C C D C C | AA0AW | 343 | 19.77 % | | 454 | 19.06 % | | 4 | C D C C C | F1AKK | 219 | 12.62 % | | 296 | 12.43 % | | 5 | C C D C C C | CO8NMN | 210 | 12.10 % | | 253 | 10.62 % | | 6 | C D D C | E70T | 16 | 0.92 % | | 21 | 0.88 % | | 7 | C D C | D4Z | 9 | 0.52 % | | 10 | 0.42 % | | 8 | D C D C | 3G2M | 8 | 0.46 % | | 10 | 0.42 % | | 9 | C D D C C | S51YI | 8 | 0.46 % | | 8 | 0.34 % | | 10 | D C D C C | 3D2AG | 8 | 0.46 % | | 8 | 0.34 % | | 11 | C C D D C | EI20C | 3 | 0.17 % | | 4 | 0.17 % | | 12 | C C D D C C C | DR10CWO | 2 | 0.12 % | | 3 | 0.13 % | | 13 | C D D C C C | S57NAW | 2 | 0.12 % | | 2 | 0.08 % | | 14 | D C D C C C | 9A1CCY | 1 | 0.06 % | | 1 | 0.04 % | | 15 | C C D C C / C D | KH6KG/W5 | 1 | 0.06 % | | 1 | 0.04 % | | 16 | C C D C / C D | KP4P/N5 | 1 | 0.06 % | | 1 | 0.04 % | | 17 | C C D C C C C C C C C | OH5STAYHOME | 1 | 0.06 % | | 1 | 0.04 % | | 18 | C C D C / D | AI0Y/9 | 1 | 0.06 % | | 2 | 0.08 % | | 19 | D C D D C | 4A60I | 1 | 0.06 % | | 1 | 0.04 % | | 20 | C C D C C C / C C | UW5EJX/MM | 1 | 0.06 % | | 1 | 0.04 % | | 21 | C D / C C D C C | W2/EU1KI | 1 | 0.06 % | | 1 | 0.04 % | | 22 | C D C C / D | W2HZ/7 | 1 | 0.06 % | | 1 | 0.04 % | | 23 | C C D / C C D C C | ZP6/HC5WC | 1 | 0.06 % | | 1 | 0.04 % | |
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