| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA1ON | 878 | 33.98 % | | 1659 | 35.62 % | | 2 | C C D C C C | CT1BOH | 652 | 25.23 % | | 956 | 20.52 % | | 3 | C C D C | AA1K | 354 | 13.70 % | | 710 | 15.24 % | | 4 | C D C C | B7HQ | 283 | 10.95 % | | 450 | 9.66 % | | 5 | C D C C C | F1GKS | 159 | 6.15 % | | 254 | 5.45 % | | 6 | C D D C | E72U | 96 | 3.72 % | | 336 | 7.21 % | | 7 | D C D C C | 4L7AA | 32 | 1.24 % | | 66 | 1.42 % | | 8 | C D D C C | A47RS | 29 | 1.12 % | | 54 | 1.16 % | | 9 | C D C | G0C | 15 | 0.58 % | | 38 | 0.82 % | | 10 | D C D C | 3Z0X | 12 | 0.46 % | | 21 | 0.45 % | | 11 | D C D C C C | 2E0CVN | 8 | 0.31 % | | 9 | 0.19 % | | 12 | C C D C C / C | DJ4MM/P | 7 | 0.27 % | | 8 | 0.17 % | | 13 | C C / C C D C | DL/HG0R | 5 | 0.19 % | | 6 | 0.13 % | | 14 | C C / C C D C C | DL/OZ1AA | 4 | 0.15 % | | 8 | 0.17 % | | 15 | C C D D D C C C | OE100RAD | 4 | 0.15 % | | 6 | 0.13 % | | 16 | C C D C C C / C | DL2KUH/P | 4 | 0.15 % | | 5 | 0.11 % | | 17 | C C D / C C D C C | EA6/DK5ON | 3 | 0.12 % | | 6 | 0.13 % | | 18 | C D C C C / C | F4GKR/P | 3 | 0.12 % | | 4 | 0.09 % | | 19 | C C / C D C C | DL/K5NA | 3 | 0.12 % | | 7 | 0.15 % | | 20 | C C / C C D C C C | DL/HB9DQL | 3 | 0.12 % | | 5 | 0.11 % | | 21 | C D C C / D | R8MB/1 | 3 | 0.12 % | | 4 | 0.09 % | | 22 | C C D C / D | RT9T/3 | 2 | 0.08 % | | 2 | 0.04 % | | 23 | C D D C C C | S56WYB | 2 | 0.08 % | | 2 | 0.04 % | | 24 | C C D C C C / C C | DG7LAN/MM | 2 | 0.08 % | | 2 | 0.04 % | | 25 | C C D D C | OG55W | 2 | 0.08 % | | 9 | 0.19 % | | 26 | C / C C D C C | F/DF5RF | 1 | 0.04 % | | 2 | 0.04 % | | 27 | C C D / C D C C C | KP4/K6DTT | 1 | 0.04 % | | 1 | 0.02 % | | 28 | D C / C D D C C | 9A/S57KM | 1 | 0.04 % | | 3 | 0.06 % | | 29 | C C D C C / D | NU1AW/9 | 1 | 0.04 % | | 3 | 0.06 % | | 30 | D C / C C D C C C | 9A/DL5ROB | 1 | 0.04 % | | 2 | 0.04 % | | 31 | C C D D C C C | AO18FWC | 1 | 0.04 % | | 1 | 0.02 % | | 32 | C C D C / C | OL5E/P | 1 | 0.04 % | | 1 | 0.02 % | | 33 | C C D D C C C C | LM90NRRL | 1 | 0.04 % | | 2 | 0.04 % | | 34 | D C D D D C | 3Z100K | 1 | 0.04 % | | 1 | 0.02 % | | 35 | C D D C C / C C | S51TA/MM | 1 | 0.04 % | | 2 | 0.04 % | | 36 | C D / C C D C C | I0/YO3XX | 1 | 0.04 % | | 1 | 0.02 % | | 37 | C C / C D C C C | SP/I4ZSQ | 1 | 0.04 % | | 2 | 0.04 % | | 38 | C C D / C C D C C C | SV8/SB9FIH | 1 | 0.04 % | | 1 | 0.02 % | | 39 | C C D / C D D C C | SV9/S55OO | 1 | 0.04 % | | 2 | 0.04 % | | 40 | C D C C C / C C D | W6PNG/VY2 | 1 | 0.04 % | | 1 | 0.02 % | | 41 | C C D C C / C C | YL3IZ/MM | 1 | 0.04 % | | 2 | 0.04 % | | 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 % | | 2 | 0.04 % | | 44 | C D D C / C C C | Z35M/QRP | 1 | 0.04 % | | 1 | 0.02 % | |
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