| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AA1O | 671 | 28.46 % | | 985 | 31.09 % | | 2 | C C D C C | AA2AD | 551 | 23.37 % | | 714 | 22.54 % | | 3 | C C D C C C | CE3DNP | 406 | 17.22 % | | 496 | 15.66 % | | 4 | C D C C | E7CW | 374 | 15.86 % | | 519 | 16.38 % | | 5 | C D C C C | F1AKK | 224 | 9.50 % | | 291 | 9.19 % | | 6 | C D D C | E70T | 30 | 1.27 % | | 39 | 1.23 % | | 7 | C D D C C | A41CK | 20 | 0.85 % | | 27 | 0.85 % | | 8 | D C D C | 3E3E | 17 | 0.72 % | | 22 | 0.69 % | | 9 | D C D C C | 4Z4AK | 15 | 0.64 % | | 16 | 0.51 % | | 10 | C D C | C4W | 14 | 0.59 % | | 17 | 0.54 % | | 11 | D C D C C C | 2E0CVN | 5 | 0.21 % | | 7 | 0.22 % | | 12 | C C D D C C C | DR10CWO | 4 | 0.17 % | | 4 | 0.13 % | | 13 | C C D C / D | AI0Y/9 | 3 | 0.13 % | | 3 | 0.09 % | | 14 | C C D D C | LX20I | 3 | 0.13 % | | 5 | 0.16 % | | 15 | C C D / C C D C C | OA4/EA7TN | 2 | 0.08 % | | 2 | 0.06 % | | 16 | D C D D C | 4A60A | 2 | 0.08 % | | 2 | 0.06 % | | 17 | C C D C / C D | KP4P/N5 | 1 | 0.04 % | | 1 | 0.03 % | | 18 | C C D C C / C | LU1AW/X | 1 | 0.04 % | | 1 | 0.03 % | | 19 | C C / C D C C | EW/R3XA | 1 | 0.04 % | | 1 | 0.03 % | | 20 | C C D D D C | LY175Z | 1 | 0.04 % | | 1 | 0.03 % | | 21 | D C D / C D C C | 5Z4/G3AB | 1 | 0.04 % | | 1 | 0.03 % | | 22 | C C D C C C C C C C C D OH5STAYHOME59 | 1 | 0.04 % | | 1 | 0.03 % | | | 23 | C C D D D C C | OL901AB | 1 | 0.04 % | | 1 | 0.03 % | | 24 | C C D / C D C C C | PJ4/K4BAI | 1 | 0.04 % | | 1 | 0.03 % | | 25 | C C D C C / C C | RA0LQ/MM | 1 | 0.04 % | | 1 | 0.03 % | | 26 | C D D C C C | S57NAW | 1 | 0.04 % | | 2 | 0.06 % | | 27 | C C D D D C C C | SN100JII | 1 | 0.04 % | | 1 | 0.03 % | | 28 | C C D D C C C C | SN95IARU | 1 | 0.04 % | | 1 | 0.03 % | | 29 | C C / C C D C C | SP/LZ3AW | 1 | 0.04 % | | 1 | 0.03 % | | 30 | C C D C C C / C | UR5GAW/P | 1 | 0.04 % | | 1 | 0.03 % | | 31 | C C D C C C / C C | UW5EJX/MM | 1 | 0.04 % | | 2 | 0.06 % | | 32 | C D / C C D C C | W2/EU1KI | 1 | 0.04 % | | 1 | 0.03 % | | 33 | C C D / C C D C C C | ZP6/LU8EOT | 1 | 0.04 % | | 1 | 0.03 % | |
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