| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA1SU | 849 | 35.32 % | | 1519 | 36.41 % | | 2 | C C D C C C | CS7AMH | 533 | 22.17 % | | 775 | 18.58 % | | 3 | C C D C | AA1K | 351 | 14.60 % | | 663 | 15.89 % | | 4 | C D C C | B1HQ | 301 | 12.52 % | | 457 | 10.95 % | | 5 | C D C C C | F1AGR | 140 | 5.82 % | | 191 | 4.58 % | | 6 | C D D C | E73Y | 92 | 3.83 % | | 321 | 7.69 % | | 7 | C D D C C | A47RS | 27 | 1.12 % | | 49 | 1.17 % | | 8 | D C D C C | 4M5EN | 25 | 1.04 % | | 49 | 1.17 % | | 9 | C D C | C4W | 16 | 0.67 % | | 33 | 0.79 % | | 10 | D C D C | 3Z0X | 12 | 0.50 % | | 20 | 0.48 % | | 11 | C C / C C D C | DL/HG0R | 5 | 0.21 % | | 5 | 0.12 % | | 12 | C C / C C D C C | DL/OZ1AA | 5 | 0.21 % | | 11 | 0.26 % | | 13 | C C D C C / C | DJ4MM/P | 4 | 0.17 % | | 6 | 0.14 % | | 14 | D C D C C C | 5B4AJC | 3 | 0.12 % | | 4 | 0.10 % | | 15 | C C / C C D C C C | DL/HB9DQL | 3 | 0.12 % | | 5 | 0.12 % | | 16 | C C / C D C C C | DL/G4IRN | 3 | 0.12 % | | 4 | 0.10 % | | 17 | C C D C / D | RG5A/6 | 3 | 0.12 % | | 6 | 0.14 % | | 18 | C C D C C C / C | DL2KUH/P | 3 | 0.12 % | | 4 | 0.10 % | | 19 | C C / C D C C | DL/K5NA | 2 | 0.08 % | | 4 | 0.10 % | | 20 | C C D C C / C C | RA0LQ/MM | 2 | 0.08 % | | 3 | 0.07 % | | 21 | C D C C C / C | F4GKR/P | 2 | 0.08 % | | 5 | 0.12 % | | 22 | C C D D C C | LM90HQ | 2 | 0.08 % | | 2 | 0.05 % | | 23 | C C D D C | OG55W | 2 | 0.08 % | | 8 | 0.19 % | | 24 | C C D D D C C C | OE100RAD | 2 | 0.08 % | | 3 | 0.07 % | | 25 | C C D D D C C | DL100BY | 1 | 0.04 % | | 1 | 0.02 % | | 26 | D C / C D D C C | 9A/S57KM | 1 | 0.04 % | | 2 | 0.05 % | | 27 | D C D D D C | 3Z100K | 1 | 0.04 % | | 2 | 0.05 % | | 28 | C C D D C C C C | LM90NRRL | 1 | 0.04 % | | 3 | 0.07 % | | 29 | C C D C C / D | NU1AW/9 | 1 | 0.04 % | | 4 | 0.10 % | | 30 | C D C C / C | F8BJ/P | 1 | 0.04 % | | 1 | 0.02 % | | 31 | C D / C C D C C | I0/YO3XX | 1 | 0.04 % | | 1 | 0.02 % | | 32 | C / C C D C C | F/DF5RF | 1 | 0.04 % | | 1 | 0.02 % | | 33 | D C / C C D C | 4L/RC5A | 1 | 0.04 % | | 1 | 0.02 % | | 34 | C D D C C / C C | S51TA/MM | 1 | 0.04 % | | 1 | 0.02 % | | 35 | C D D C C C | S57NML | 1 | 0.04 % | | 1 | 0.02 % | | 36 | C C D C / C | SE5Z/P | 1 | 0.04 % | | 1 | 0.02 % | | 37 | C C D C C C / C C | SP5LJP/MM | 1 | 0.04 % | | 1 | 0.02 % | | 38 | C C D / C C D C C | SV2/RW3AL | 1 | 0.04 % | | 1 | 0.02 % | | 39 | C C D / C C D C C C | SV8/HB9FIH | 1 | 0.04 % | | 1 | 0.02 % | | 40 | C D C C / D | W1AW/4 | 1 | 0.04 % | | 1 | 0.02 % | | 41 | C C D C C / C C C | YU1LM/QRP | 1 | 0.04 % | | 2 | 0.05 % | |
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