| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA1SU | 856 | 34.61 % | | 1581 | 36.26 % | | 2 | C C D C C C | CT1BOH | 585 | 23.66 % | | 863 | 19.79 % | | 3 | C C D C | AA1K | 350 | 14.15 % | | 679 | 15.57 % | | 4 | C D C C | D1HQ | 299 | 12.09 % | | 467 | 10.71 % | | 5 | C D C C C | F4EFI | 142 | 5.74 % | | 205 | 4.70 % | | 6 | C D D C | E70A | 93 | 3.76 % | | 299 | 6.86 % | | 7 | C D D C C | A47RS | 29 | 1.17 % | | 48 | 1.10 % | | 8 | D C D C C | 4M5EN | 22 | 0.89 % | | 40 | 0.92 % | | 9 | C D C | G3P | 15 | 0.61 % | | 39 | 0.89 % | | 10 | D C D C | 3Z0X | 13 | 0.53 % | | 20 | 0.46 % | | 11 | C C / C D C C | DL/K5NA | 5 | 0.20 % | | 15 | 0.34 % | | 12 | C C D C C / C | DK2RZ/M | 5 | 0.20 % | | 7 | 0.16 % | | 13 | C C D C C C / C | DL2KUH/P | 4 | 0.16 % | | 7 | 0.16 % | | 14 | C C / C C D C | DL/HG0R | 4 | 0.16 % | | 9 | 0.21 % | | 15 | D C D C C C | 2W0WOD | 3 | 0.12 % | | 4 | 0.09 % | | 16 | C D C C / D | R8MB/1 | 3 | 0.12 % | | 5 | 0.11 % | | 17 | C C / C C D C C | DL/OZ1AA | 3 | 0.12 % | | 5 | 0.11 % | | 18 | C C D D D C C C | OE100CQB | 3 | 0.12 % | | 4 | 0.09 % | | 19 | C D D C C C | E20YLM | 3 | 0.12 % | | 3 | 0.07 % | | 20 | C C / C D C C C | DL/I4VEQ | 3 | 0.12 % | | 5 | 0.11 % | | 21 | C D C C C / C | F4GKR/P | 3 | 0.12 % | | 5 | 0.11 % | | 22 | C / C C D C C | F/DF5RF | 2 | 0.08 % | | 2 | 0.05 % | | 23 | C C D C C C / C C | DG7LAN/MM | 2 | 0.08 % | | 2 | 0.05 % | | 24 | C C D D C | OG55W | 2 | 0.08 % | | 9 | 0.21 % | | 25 | C C / C C D C C C | DL/HB9DQL | 2 | 0.08 % | | 5 | 0.11 % | | 26 | C C D C / D | RT9T/3 | 2 | 0.08 % | | 3 | 0.07 % | | 27 | C C D C C / C C | RA0LQ/MM | 2 | 0.08 % | | 4 | 0.09 % | | 28 | C C D C C / D | NU1AW/9 | 2 | 0.08 % | | 3 | 0.07 % | | 29 | C C D C C / C D | KH6ND/W7 | 1 | 0.04 % | | 1 | 0.02 % | | 30 | C C D C C C / C C C | EA7AAW/QRP | 1 | 0.04 % | | 2 | 0.05 % | | 31 | C C D C / C C D | NP4G/KP2 | 1 | 0.04 % | | 1 | 0.02 % | | 32 | C C D D C C C C | LM90NRRL | 1 | 0.04 % | | 2 | 0.05 % | | 33 | C / C D C C C | F/G0PZA | 1 | 0.04 % | | 1 | 0.02 % | | 34 | D C / C C D C | 4L/RC5A | 1 | 0.04 % | | 1 | 0.02 % | | 35 | C C D D C C C | OH73ELK | 1 | 0.04 % | | 1 | 0.02 % | | 36 | D C / C D D C C | 9A/S57KM | 1 | 0.04 % | | 2 | 0.05 % | | 37 | C D / C C D C C | I0/YO3XX | 1 | 0.04 % | | 1 | 0.02 % | | 38 | C D C C C / D | K9QVB/9 | 1 | 0.04 % | | 1 | 0.02 % | | 39 | C C D C / C | SE5Z/P | 1 | 0.04 % | | 1 | 0.02 % | | 40 | C C D / C D D C C | SV9/S55OO | 1 | 0.04 % | | 1 | 0.02 % | | 41 | C D C C C / C C D | W6PNG/VY2 | 1 | 0.04 % | | 1 | 0.02 % | | 42 | C C D D D C | YR100R | 1 | 0.04 % | | 1 | 0.02 % | | 43 | C C D C C / C C C | YU1LM/QRP | 1 | 0.04 % | | 3 | 0.07 % | | 44 | C D D C / C C C | Z35M/QRP | 1 | 0.04 % | | 2 | 0.05 % | |
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