| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA1ON | 777 | 34.91 % | | 1317 | 35.25 % | | 2 | C C D C C C | AG4WIQ | 500 | 22.46 % | | 724 | 19.38 % | | 3 | C C D C | AA1K | 314 | 14.11 % | | 560 | 14.99 % | | 4 | C D C C | B1HQ | 275 | 12.35 % | | 395 | 10.57 % | | 5 | C D C C C | F1RAF | 140 | 6.29 % | | 206 | 5.51 % | | 6 | C D D C | E72U | 88 | 3.95 % | | 300 | 8.03 % | | 7 | C D D C C | E77EA | 26 | 1.17 % | | 46 | 1.23 % | | 8 | D C D C C | 4M5EN | 22 | 0.99 % | | 44 | 1.18 % | | 9 | C D C | C4W | 15 | 0.67 % | | 30 | 0.80 % | | 10 | D C D C | 3Z0X | 12 | 0.54 % | | 19 | 0.51 % | | 11 | C C D C C / C | DJ4MM/P | 5 | 0.22 % | | 9 | 0.24 % | | 12 | C C / C C D C | DL/HG0R | 4 | 0.18 % | | 8 | 0.21 % | | 13 | C C / C C D C C | DL/OZ1AA | 4 | 0.18 % | | 8 | 0.21 % | | 14 | C C / C C D C C C | DL/HB9DQL | 4 | 0.18 % | | 5 | 0.13 % | | 15 | C C / C D C C C | DL/I4VEQ | 3 | 0.13 % | | 3 | 0.08 % | | 16 | C / C C D C C | F/DF5RF | 3 | 0.13 % | | 3 | 0.08 % | | 17 | C C / C D C C | DL/W1SJ | 3 | 0.13 % | | 8 | 0.21 % | | 18 | C D C C C / C | F4GKR/P | 3 | 0.13 % | | 4 | 0.11 % | | 19 | C C D C C C / C | DL2KUH/P | 2 | 0.09 % | | 4 | 0.11 % | | 20 | C C D D D C C C | OE100RAD | 2 | 0.09 % | | 4 | 0.11 % | | 21 | C D D C C C | S56WYB | 2 | 0.09 % | | 3 | 0.08 % | | 22 | C C D C / D | RT9T/3 | 2 | 0.09 % | | 3 | 0.08 % | | 23 | C C D C C / D | NU1AW/9 | 2 | 0.09 % | | 3 | 0.08 % | | 24 | C C D D C | OG55W | 2 | 0.09 % | | 9 | 0.24 % | | 25 | D C / C C D C | 4L/RC5A | 1 | 0.04 % | | 1 | 0.03 % | | 26 | C C C D C | MMI0M | 1 | 0.04 % | | 1 | 0.03 % | | 27 | D C / C D D C C | 9A/S57KM | 1 | 0.04 % | | 3 | 0.08 % | | 28 | D C D C C C | 5B4AJC | 1 | 0.04 % | | 1 | 0.03 % | | 29 | D C D D D C | 3Z100K | 1 | 0.04 % | | 1 | 0.03 % | | 30 | C C D D C C C | OH73ELK | 1 | 0.04 % | | 1 | 0.03 % | | 31 | C / C D C C C | F/G0PZA | 1 | 0.04 % | | 1 | 0.03 % | | 32 | C D D C C / C C C | S51EC/QRP | 1 | 0.04 % | | 1 | 0.03 % | | 33 | C D D C C / C C | S51TA/MM | 1 | 0.04 % | | 2 | 0.05 % | | 34 | C D / C C D C C | I0/YO3XX | 1 | 0.04 % | | 1 | 0.03 % | | 35 | C C D C / C | SE5Z/P | 1 | 0.04 % | | 1 | 0.03 % | | 36 | C C D C C C / C C | SP5LJP/MM | 1 | 0.04 % | | 1 | 0.03 % | | 37 | C C D / C C D C C | SV2/RW3AL | 1 | 0.04 % | | 2 | 0.05 % | | 38 | C D C C / D | W9OA/9 | 1 | 0.04 % | | 1 | 0.03 % | | 39 | C C D C C / C C | YL3IZ/MM | 1 | 0.04 % | | 2 | 0.05 % | | 40 | C C D D D C | YR100R | 1 | 0.04 % | | 1 | 0.03 % | |
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