| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA1ON | 914 | 33.59 % | | 1729 | 34.96 % | | 2 | C C D C C C | CT1BOH | 728 | 26.75 % | | 1096 | 22.16 % | | 3 | C C D C | AA1K | 350 | 12.86 % | | 684 | 13.83 % | | 4 | C D C C | D1HQ | 293 | 10.77 % | | 456 | 9.22 % | | 5 | C D C C C | F1AGR | 168 | 6.17 % | | 258 | 5.22 % | | 6 | C D D C | E70A | 93 | 3.42 % | | 375 | 7.58 % | | 7 | C D D C C | A47RS | 35 | 1.29 % | | 64 | 1.29 % | | 8 | D C D C C | 4M5EN | 25 | 0.92 % | | 60 | 1.21 % | | 9 | C D C | C4W | 18 | 0.66 % | | 45 | 0.91 % | | 10 | D C D C | 3Z0X | 13 | 0.48 % | | 20 | 0.40 % | | 11 | C C D C C / C | DH5AS/P | 10 | 0.37 % | | 19 | 0.38 % | | 12 | D C D C C C | 2E0MNG | 7 | 0.26 % | | 8 | 0.16 % | | 13 | C C / C C D C C | DL/OZ1AA | 6 | 0.22 % | | 15 | 0.30 % | | 14 | C C / C C D C | DL/HG0R | 6 | 0.22 % | | 13 | 0.26 % | | 15 | C C / C C D C C C | DL/HB9DQL | 6 | 0.22 % | | 11 | 0.22 % | | 16 | C C / C D C C | DL/K5NA | 5 | 0.18 % | | 13 | 0.26 % | | 17 | C D C C C / C | F4GKR/P | 5 | 0.18 % | | 9 | 0.18 % | | 18 | C C D C C C / C | DG3LSM/P | 5 | 0.18 % | | 6 | 0.12 % | | 19 | C D D C C C | E20YLM | 3 | 0.11 % | | 3 | 0.06 % | | 20 | C C / C D C C C | DL/G4IRN | 3 | 0.11 % | | 6 | 0.12 % | | 21 | C D C C / D | R8MB/1 | 3 | 0.11 % | | 3 | 0.06 % | | 22 | C C D D D C C C | OE100CQB | 2 | 0.07 % | | 4 | 0.08 % | | 23 | C C D C C / D | NU1AW/9 | 2 | 0.07 % | | 5 | 0.10 % | | 24 | C C D D C | OG55W | 2 | 0.07 % | | 11 | 0.22 % | | 25 | C / C C D C C | F/DF5RF | 2 | 0.07 % | | 3 | 0.06 % | | 26 | C C D C / D | RT9T/3 | 2 | 0.07 % | | 3 | 0.06 % | | 27 | C C D C C / C C | RA0LQ/MM | 2 | 0.07 % | | 2 | 0.04 % | | 28 | C / C D C C C | F/G0PZI | 1 | 0.04 % | | 1 | 0.02 % | | 29 | C C D D C C C C | LM90NRRL | 1 | 0.04 % | | 3 | 0.06 % | | 30 | D C / C C D C | 4L/RC5A | 1 | 0.04 % | | 2 | 0.04 % | | 31 | C C D / C C D C C | EA6/DK5ON | 1 | 0.04 % | | 1 | 0.02 % | | 32 | C C D D C C | LY85DS | 1 | 0.04 % | | 1 | 0.02 % | | 33 | D C / C D D C C | 9A/S57KM | 1 | 0.04 % | | 4 | 0.08 % | | 34 | C C D D C C C | OV18FWC | 1 | 0.04 % | | 2 | 0.04 % | | 35 | D C D D D C | 3Z100K | 1 | 0.04 % | | 1 | 0.02 % | | 36 | C C D C C C C | DA0WRTC | 1 | 0.04 % | | 3 | 0.06 % | | 37 | C D / C C D C C | I0/YO3XX | 1 | 0.04 % | | 1 | 0.02 % | | 38 | C D D C C / C C | S51TA/MM | 1 | 0.04 % | | 1 | 0.02 % | | 39 | C C D D D C | YR100R | 1 | 0.04 % | | 2 | 0.04 % | | 40 | C C D C C / C C C | YU1LM/QRP | 1 | 0.04 % | | 2 | 0.04 % | |
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