| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA1ON | 953 | 33.60 % | | 1741 | 35.18 % | | 2 | C C D C C C | CT1BOH | 716 | 25.25 % | | 1077 | 21.76 % | | 3 | C C D C | AA1V | 363 | 12.80 % | | 696 | 14.06 % | | 4 | C D C C | D1HQ | 333 | 11.74 % | | 513 | 10.37 % | | 5 | C D C C C | F1HLH | 218 | 7.69 % | | 329 | 6.65 % | | 6 | C D D C | E72U | 89 | 3.14 % | | 301 | 6.08 % | | 7 | C D D C C | A47RS | 27 | 0.95 % | | 48 | 0.97 % | | 8 | D C D C C | 4M5EN | 27 | 0.95 % | | 51 | 1.03 % | | 9 | C D C | G0C | 18 | 0.63 % | | 44 | 0.89 % | | 10 | D C D C | 3Z0X | 13 | 0.46 % | | 27 | 0.55 % | | 11 | D C D C C C | 2E0HBV | 9 | 0.32 % | | 11 | 0.22 % | | 12 | C C D C C / C | DB3DE/P | 8 | 0.28 % | | 10 | 0.20 % | | 13 | C C D C C C / C | DL2KUH/P | 7 | 0.25 % | | 8 | 0.16 % | | 14 | C D C C C / C | F4GKR/P | 5 | 0.18 % | | 8 | 0.16 % | | 15 | C C / C C D C | DL/HG0R | 4 | 0.14 % | | 5 | 0.10 % | | 16 | C C D D D C C C | OE100RAD | 3 | 0.11 % | | 4 | 0.08 % | | 17 | C C / C D C C | DL/K3LA | 3 | 0.11 % | | 10 | 0.20 % | | 18 | C C / C C D C C C | DL/HB9DQL | 3 | 0.11 % | | 7 | 0.14 % | | 19 | C C D / C C D C C | EA6/DK5ON | 2 | 0.07 % | | 2 | 0.04 % | | 20 | D C / C C D C C C | 9A/DL5ROB | 2 | 0.07 % | | 2 | 0.04 % | | 21 | C / C C D C C | F/DF5RF | 2 | 0.07 % | | 3 | 0.06 % | | 22 | C C D D C C C | DB25ONN | 2 | 0.07 % | | 2 | 0.04 % | | 23 | C C D C / D | RT9T/3 | 2 | 0.07 % | | 5 | 0.10 % | | 24 | C D D C C C | S56WYB | 2 | 0.07 % | | 4 | 0.08 % | | 25 | C C / C C D C C | DL/OZ1AA | 2 | 0.07 % | | 2 | 0.04 % | | 26 | C C D C C / D | NU1AW/9 | 2 | 0.07 % | | 3 | 0.06 % | | 27 | C D C C / D | R8MB/1 | 2 | 0.07 % | | 4 | 0.08 % | | 28 | C C D D C | OG55W | 2 | 0.07 % | | 10 | 0.20 % | | 29 | D C D C C / C | 9A6DR/P | 1 | 0.04 % | | 1 | 0.02 % | | 30 | D C / C C D C | 4L/RC5A | 1 | 0.04 % | | 1 | 0.02 % | | 31 | C C D D D C C | DL100BY | 1 | 0.04 % | | 1 | 0.02 % | | 32 | C C C C D C C C | CTYO8DOH | 1 | 0.04 % | | 1 | 0.02 % | | 33 | C C D D C C C C | LM90NRRL | 1 | 0.04 % | | 3 | 0.06 % | | 34 | C C D C / C C D | NP4G/KP2 | 1 | 0.04 % | | 1 | 0.02 % | | 35 | C C D C C C / C C C | EA7AAW/QRP | 1 | 0.04 % | | 1 | 0.02 % | | 36 | C D / C C D C C | I0/YO3XX | 1 | 0.04 % | | 1 | 0.02 % | | 37 | C C D D C C | LM90HQ | 1 | 0.04 % | | 1 | 0.02 % | | 38 | C / C D C C C | F/G0PZA | 1 | 0.04 % | | 1 | 0.02 % | | 39 | D C / C D D C C | 9A/S57KM | 1 | 0.04 % | | 2 | 0.04 % | | 40 | C D D C C / C C | S51TA/MM | 1 | 0.04 % | | 2 | 0.04 % | | 41 | C C D C C C C | DA0WRTC | 1 | 0.04 % | | 1 | 0.02 % | | 42 | C C D C / C | SE5Z/P | 1 | 0.04 % | | 1 | 0.02 % | | 43 | C C / C D C C C | SP/I4ZSQ | 1 | 0.04 % | | 2 | 0.04 % | | 44 | C C D C C / C C | YL3IZ/MM | 1 | 0.04 % | | 1 | 0.02 % | | 45 | C C D C C / C C C | YU1LM/QRP | 1 | 0.04 % | | 1 | 0.02 % | |
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