| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | BA7LIP | 2340 | 49.23 % | | 4217 | 52.22 % | | 2 | C C D C C | AA5AT | 1129 | 23.75 % | | 1814 | 22.46 % | | 3 | C D C C C | D0IBM | 620 | 13.04 % | | 1008 | 12.48 % | | 4 | C C D C | AA3B | 217 | 4.57 % | | 322 | 3.99 % | | 5 | C D C C | D1CQ | 177 | 3.72 % | | 276 | 3.42 % | | 6 | D C D C C | 3Z5YT | 48 | 1.01 % | | 81 | 1.00 % | | 7 | D C D C C C | 0N8SGA | 46 | 0.97 % | | 75 | 0.93 % | | 8 | C D D C C | A41ZZ | 31 | 0.65 % | | 41 | 0.51 % | | 9 | C C D C C C / C C C | DL1AWS/QRP | 22 | 0.46 % | | 23 | 0.28 % | | 10 | D C D C | 3Z8Z | 12 | 0.25 % | | 60 | 0.74 % | | 11 | C D D C | A25R | 10 | 0.21 % | | 21 | 0.26 % | | 12 | C C D / C C D C C | CT9/TF3CW | 7 | 0.15 % | | 7 | 0.09 % | | 13 | C C D C C C / D | EA8AAH/5 | 7 | 0.15 % | | 10 | 0.12 % | | 14 | C C D D C C C | DL25KYF | 7 | 0.15 % | | 11 | 0.14 % | | 15 | C C D C C C / C | DL8NDV/P | 6 | 0.13 % | | 6 | 0.07 % | | 16 | C D C C C / C | F4AAS/P | 5 | 0.11 % | | 8 | 0.10 % | | 17 | C D C C C / C C C | F4FHM/QRP | 5 | 0.11 % | | 6 | 0.07 % | | 18 | C C D D D C C C | AM775CPT | 5 | 0.11 % | | 12 | 0.15 % | | 19 | C C D C C / C | DJ6DN/P | 5 | 0.11 % | | 5 | 0.06 % | | 20 | C C D D D C C | AM175MB | 4 | 0.08 % | | 5 | 0.06 % | | 21 | C D D C C C | R90BAK | 4 | 0.08 % | | 4 | 0.05 % | | 22 | C C / C C D C C | EA/PA5JF | 4 | 0.08 % | | 7 | 0.09 % | | 23 | C C D C C C C | II4CLTT | 3 | 0.06 % | | 3 | 0.04 % | | 24 | C D C C / D | N1UL/2 | 2 | 0.04 % | | 7 | 0.09 % | | 25 | C C D D C C C C | HZ30EXPO | 2 | 0.04 % | | 2 | 0.02 % | | 26 | C C / C D C C C | DL/W0DZU | 2 | 0.04 % | | 2 | 0.02 % | | 27 | C C D D C | LZ40C | 2 | 0.04 % | | 4 | 0.05 % | | 28 | C C D C C / C C C | HA4FY/QRP | 2 | 0.04 % | | 2 | 0.02 % | | 29 | C C D C C C C C | EH5MIURA | 2 | 0.04 % | | 2 | 0.02 % | | 30 | D C D D C | 4W98X | 1 | 0.02 % | | 1 | 0.01 % | | 31 | C C D / C D D C C | CT9/S51TA | 1 | 0.02 % | | 1 | 0.01 % | | 32 | C / C C D C C C | F/DL3IAS | 1 | 0.02 % | | 2 | 0.02 % | | 33 | C C D D D C C C C C | DL100RADIO | 1 | 0.02 % | | 1 | 0.01 % | | 34 | D C D C C / C C C | 9A9RA/QRP | 1 | 0.02 % | | 1 | 0.01 % | | 35 | C D C C C / C C C C | F4JMJ/QRPP | 1 | 0.02 % | | 1 | 0.01 % | | 36 | D C D D C C | 3Z70FI | 1 | 0.02 % | | 4 | 0.05 % | | 37 | C C D D C C | EI80MB | 1 | 0.02 % | | 1 | 0.01 % | | 38 | C D C C C C C C | E7BOSNIA | 1 | 0.02 % | | 1 | 0.01 % | | 39 | D C / C C D C C C / C | 9A/DL1KBA/P | 1 | 0.02 % | | 1 | 0.01 % | | 40 | C C / C C D C C C | EA/SP9MIV | 1 | 0.02 % | | 1 | 0.01 % | | 41 | C C D / C C D C C C | EA5/ON4ANV | 1 | 0.02 % | | 1 | 0.01 % | | 42 | C D C C C / D | N3RTX/3 | 1 | 0.02 % | | 1 | 0.01 % | | 43 | C C D D D C | HF440W | 1 | 0.02 % | | 1 | 0.01 % | | 44 | C D / C C D C | P4/WE9V | 1 | 0.02 % | | 1 | 0.01 % | | 45 | C C D D C C C C C | PI37EUDXF | 1 | 0.02 % | | 1 | 0.01 % | | 46 | C D D D C C | R100ZK | 1 | 0.02 % | | 1 | 0.01 % | | 47 | C D D D D C C | R1941MB | 1 | 0.02 % | | 1 | 0.01 % | | 48 | C D C C / C | R2EA/P | 1 | 0.02 % | | 3 | 0.04 % | | 49 | C C D C / C | OS4K/P | 1 | 0.02 % | | 2 | 0.02 % | | 50 | C C D C C / D | RC3XG/4 | 1 | 0.02 % | | 1 | 0.01 % | | 51 | C C C | RTK | 1 | 0.02 % | | 1 | 0.01 % | | 52 | C C C D C C | SPU3OK | 1 | 0.02 % | | 1 | 0.01 % | | 53 | C D D C C / C C C | T77BV/QRP | 1 | 0.02 % | | 1 | 0.01 % | | 54 | C C D / C C D C | TA4/PE2M | 1 | 0.02 % | | 1 | 0.01 % | | 55 | C C / C D C C C / C | TK/F4LBZ/P | 1 | 0.02 % | | 1 | 0.01 % | | 56 | C D C C / C C D | W1AW/KP4 | 1 | 0.02 % | | 2 | 0.02 % | |
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