| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CM3HVY | 601 | 38.45 % | | 782 | 36.19 % | | 2 | C C D C C | AA4LS | 509 | 32.57 % | | 752 | 34.80 % | | 3 | C D C C C | F1DSZ | 182 | 11.64 % | | 216 | 10.00 % | | 4 | C D C C | F5VV | 110 | 7.04 % | | 141 | 6.52 % | | 5 | C C D C | AA7A | 70 | 4.48 % | | 141 | 6.52 % | | 6 | D C D C C | 4X4DU | 13 | 0.83 % | | 21 | 0.97 % | | 7 | C D D C C | A41CK | 12 | 0.77 % | | 21 | 0.97 % | | 8 | D C D C C C | 2E0DCS | 8 | 0.51 % | | 9 | 0.42 % | | 9 | C C D C C C / C C C | IZ3KMY/QRP | 5 | 0.32 % | | 6 | 0.28 % | | 10 | C D D C | E77O | 5 | 0.32 % | | 11 | 0.51 % | | 11 | C C D C C / D | EC5AC/6 | 4 | 0.26 % | | 4 | 0.19 % | | 12 | C C D / C C D C C C | EA8/DL1RNT | 3 | 0.19 % | | 3 | 0.14 % | | 13 | C D C C C / C | F6ARL/M | 3 | 0.19 % | | 3 | 0.14 % | | 14 | C C D D D C C C | GR150NIB | 3 | 0.19 % | | 4 | 0.19 % | | 15 | D C D C | 4K9W | 3 | 0.19 % | | 3 | 0.14 % | | 16 | C C D D C C | TM16PO | 2 | 0.13 % | | 4 | 0.19 % | | 17 | C C D D D C | SQ100I | 2 | 0.13 % | | 5 | 0.23 % | | 18 | D C D C C C / C | 2M0GVB/P | 2 | 0.13 % | | 2 | 0.09 % | | 19 | C D C C C / C C C | F8VOL/QRP | 2 | 0.13 % | | 2 | 0.09 % | | 20 | C C D C C / C C C | HA4TJ/QRP | 2 | 0.13 % | | 2 | 0.09 % | | 21 | C C D C C C / D | UA0KCX/3 | 2 | 0.13 % | | 2 | 0.09 % | | 22 | C C D D C C C | DJ70WAE | 2 | 0.13 % | | 2 | 0.09 % | | 23 | D C D D D C | 3Z100I | 1 | 0.06 % | | 2 | 0.09 % | | 24 | D C D / C C D C C | 5Z4/LZ4NM | 1 | 0.06 % | | 1 | 0.05 % | | 25 | C C D / C D C C C | CT7/F6HBR | 1 | 0.06 % | | 2 | 0.09 % | | 26 | C C / C C D C C C | FY/DL5FAB | 1 | 0.06 % | | 1 | 0.05 % | | 27 | D C D C C / C | 9A6DR/P | 1 | 0.06 % | | 1 | 0.05 % | | 28 | C C / C D C C C | DL/W5HWZ | 1 | 0.06 % | | 1 | 0.05 % | | 29 | C C / C D C C | EW/R1AT | 1 | 0.06 % | | 1 | 0.05 % | | 30 | C C D C C C C | LM9NRRL | 1 | 0.06 % | | 1 | 0.05 % | | 31 | C C D D D D C C C | LZ1545POA | 1 | 0.06 % | | 6 | 0.28 % | | 32 | C C D C C / C | PD1RA/M | 1 | 0.06 % | | 1 | 0.05 % | | 33 | D C / C C D C C | 5B/UT5SI | 1 | 0.06 % | | 1 | 0.05 % | | 34 | C C D C / D | RT9T/3 | 1 | 0.06 % | | 1 | 0.05 % | | 35 | C C / C C D C | DL/WR3Y | 1 | 0.06 % | | 1 | 0.05 % | | 36 | C C D C C C / C | DL3MBL/M | 1 | 0.06 % | | 1 | 0.05 % | | 37 | C D C C / D | R2ET/9 | 1 | 0.06 % | | 1 | 0.05 % | | 38 | C C D C C C / C C | UR3IDD/MM | 1 | 0.06 % | | 1 | 0.05 % | | 39 | C D C C / C C C | W2WC/QRP | 1 | 0.06 % | | 1 | 0.05 % | | 40 | C D D C C C | Z33ZOD | 1 | 0.06 % | | 1 | 0.05 % | |
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