| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA4AK | 881 | 34.78 % | | 1644 | 36.35 % | | 2 | C C D C C C | BG8NKX | 651 | 25.70 % | | 942 | 20.83 % | | 3 | C C D C | AA1K | 334 | 13.19 % | | 665 | 14.70 % | | 4 | C D C C | B7HQ | 266 | 10.50 % | | 407 | 9.00 % | | 5 | C D C C C | F1AER | 126 | 4.97 % | | 193 | 4.27 % | | 6 | C D D C | E70A | 98 | 3.87 % | | 338 | 7.47 % | | 7 | D C D C C | 3V8CB | 35 | 1.38 % | | 66 | 1.46 % | | 8 | C D D C C | A61ZX | 29 | 1.14 % | | 60 | 1.33 % | | 9 | D C D C | 3Z0X | 16 | 0.63 % | | 21 | 0.46 % | | 10 | C D C | C4W | 15 | 0.59 % | | 39 | 0.86 % | | 11 | C C D C C / C | DH5AS/P | 8 | 0.32 % | | 10 | 0.22 % | | 12 | C C / C D C C | DL/K1AR | 7 | 0.28 % | | 20 | 0.44 % | | 13 | D C D C C C | 9A1CCB | 6 | 0.24 % | | 7 | 0.15 % | | 14 | C C / C C D C | DL/HG0R | 6 | 0.24 % | | 14 | 0.31 % | | 15 | C C / C D C C C | DL/G4IRN | 5 | 0.20 % | | 9 | 0.20 % | | 16 | C C D C C C / C | DL2KUH/P | 5 | 0.20 % | | 10 | 0.22 % | | 17 | C C / C C D C C | DL/OZ1AA | 5 | 0.20 % | | 15 | 0.33 % | | 18 | C C / C C D C C C | DL/HB9DQL | 5 | 0.20 % | | 10 | 0.22 % | | 19 | C C D D D C C C | OE100CQB | 4 | 0.16 % | | 6 | 0.13 % | | 20 | C D C C / D | R8MB/1 | 3 | 0.12 % | | 4 | 0.09 % | | 21 | C D D C C C | E20YLM | 3 | 0.12 % | | 3 | 0.07 % | | 22 | C C D / C C D C C | KP2/AA1BU | 2 | 0.08 % | | 2 | 0.04 % | | 23 | C C D C C / C C | RA0LQ/MM | 2 | 0.08 % | | 3 | 0.07 % | | 24 | C C D D C C C | OH73ELK | 2 | 0.08 % | | 3 | 0.07 % | | 25 | C C D D C | OG55W | 2 | 0.08 % | | 10 | 0.22 % | | 26 | C C D C / D | RG5A/6 | 2 | 0.08 % | | 2 | 0.04 % | | 27 | D C / C C D C | 4L/RC5A | 1 | 0.04 % | | 3 | 0.07 % | | 28 | D C / C D D C C | 9A/S57KM | 1 | 0.04 % | | 3 | 0.07 % | | 29 | D C / C D D C | 9A/S55G | 1 | 0.04 % | | 1 | 0.02 % | | 30 | C D C C C / C | F8BJE/P | 1 | 0.04 % | | 1 | 0.02 % | | 31 | C C D C C C / C C C | EA7AAW/QRP | 1 | 0.04 % | | 1 | 0.02 % | | 32 | C C D D C C | LM90HQ | 1 | 0.04 % | | 1 | 0.02 % | | 33 | C C D C C / D | NU1AW/9 | 1 | 0.04 % | | 1 | 0.02 % | | 34 | C C D C C C C | DA0WRTC | 1 | 0.04 % | | 1 | 0.02 % | | 35 | D C D D D C | 3Z100K | 1 | 0.04 % | | 1 | 0.02 % | | 36 | C / C C D C C | F/PD1RP | 1 | 0.04 % | | 1 | 0.02 % | | 37 | C C D / C C D C C C / C' | ES7/OH3KAV/M | 1 | 0.04 % | | 1 | 0.02 % | | 38 | C D D C C / C C | S51TA/MM | 1 | 0.04 % | | 2 | 0.04 % | | 39 | C C D C / C | TF3Y/P | 1 | 0.04 % | | 1 | 0.02 % | | 40 | C C D D D C | YR100R | 1 | 0.04 % | | 1 | 0.02 % | | 41 | C C D C C / C C C | YU1LM/QRP | 1 | 0.04 % | | 1 | 0.02 % | |
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