| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA4AK | 864 | 32.43 % | | 1504 | 34.39 % | | 2 | C C D C C C | BH4TQX | 855 | 32.09 % | | 1201 | 27.46 % | | 3 | C C D C | AA1K | 360 | 13.51 % | | 776 | 17.75 % | | 4 | C D C C C | F1AGR | 212 | 7.96 % | | 262 | 5.99 % | | 5 | C D C C | B4HQ | 153 | 5.74 % | | 242 | 5.53 % | | 6 | D C D C C | 3V8SS | 34 | 1.28 % | | 62 | 1.42 % | | 7 | C D D C C | A41PG | 34 | 1.28 % | | 71 | 1.62 % | | 8 | C D D C | A61D | 25 | 0.94 % | | 71 | 1.62 % | | 9 | D C D C C C | 2E0BBP | 24 | 0.90 % | | 33 | 0.75 % | | 10 | D C D C | 3Z0X | 15 | 0.56 % | | 27 | 0.62 % | | 11 | C D C | C4I | 12 | 0.45 % | | 32 | 0.73 % | | 12 | C C D C C C / C | DL1DXF/P | 10 | 0.38 % | | 12 | 0.27 % | | 13 | C C D C C / C | DF6FM/M | 9 | 0.34 % | | 10 | 0.23 % | | 14 | C D D C C C | D44TWO | 8 | 0.30 % | | 11 | 0.25 % | | 15 | C D C C C / C | F4CVA/P | 6 | 0.23 % | | 6 | 0.14 % | | 16 | C C D C C C / D | IK3UNA/1 | 5 | 0.19 % | | 9 | 0.21 % | | 17 | C C D / C C D C C C | EA5/LA8OKA | 4 | 0.15 % | | 4 | 0.09 % | | 18 | C C D C / D | RG5A/6 | 3 | 0.11 % | | 4 | 0.09 % | | 19 | C C D C C / D | NU1AW/6 | 3 | 0.11 % | | 5 | 0.11 % | | 20 | C D C C / D | R7RF/6 | 2 | 0.08 % | | 2 | 0.05 % | | 21 | C C / C C D C C | ON/HA8MT | 2 | 0.08 % | | 2 | 0.05 % | | 22 | C C D D C C | OZ30EU | 2 | 0.08 % | | 3 | 0.07 % | | 23 | C C D / C C D C C | EA6/DK5ON | 2 | 0.08 % | | 2 | 0.05 % | | 24 | D C D C C C / C C C | 9A7JZC/QRP | 1 | 0.04 % | | 1 | 0.02 % | | 25 | D C D / C C D C C | 9A4/DL4CB | 1 | 0.04 % | | 1 | 0.02 % | | 26 | D C D C C / C | 9A1SZ/P | 1 | 0.04 % | | 1 | 0.02 % | | 27 | C C / C D C C | EI/W5GN | 1 | 0.04 % | | 1 | 0.02 % | | 28 | C C D C C C C C | DL0POLIO | 1 | 0.04 % | | 1 | 0.02 % | | 29 | D C D C C C / C | 9A3EME/P | 1 | 0.04 % | | 1 | 0.02 % | | 30 | C D / C C D C C | I0/LZ2OG | 1 | 0.04 % | | 1 | 0.02 % | | 31 | C C D / C D C C | HR5/F2JD | 1 | 0.04 % | | 1 | 0.02 % | | 32 | C C D C C / C C C | EC7MA/QRP | 1 | 0.04 % | | 1 | 0.02 % | | 33 | C C / C C D C C C / C | OM/SQ9SXO/P | 1 | 0.04 % | | 1 | 0.02 % | | 34 | C / C C D C C C | F/IU0BMX | 1 | 0.04 % | | 1 | 0.02 % | | 35 | C / C C D C C | F/PD1RP | 1 | 0.04 % | | 1 | 0.02 % | | 36 | D C D C C C C C | 9A1TESLA | 1 | 0.04 % | | 1 | 0.02 % | | 37 | C C / C C D C | RA/EU4A | 1 | 0.04 % | | 1 | 0.02 % | | 38 | C C D D D C C C | GB100DCS | 1 | 0.04 % | | 2 | 0.05 % | | 39 | C C D C / C | RQ4D/B | 1 | 0.04 % | | 1 | 0.02 % | | 40 | C C / C D C C C | SP/K6JHF | 1 | 0.04 % | | 1 | 0.02 % | | 41 | C C D / C D C C C | TA4/G4IJD | 1 | 0.04 % | | 1 | 0.02 % | | 42 | C C D D C C C | TM35KMY | 1 | 0.04 % | | 1 | 0.02 % | | 43 | C C D D C C C C | TM62EURO | 1 | 0.04 % | | 2 | 0.05 % | |
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