| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AA1K | 386 | 29.26 % | | 561 | 32.30 % | | 2 | C C D C C | AA1ON | 325 | 24.64 % | | 414 | 23.83 % | | 3 | C D C C | E7CW | 253 | 19.18 % | | 334 | 19.23 % | | 4 | C C D C C C | BA4AEO | 210 | 15.92 % | | 247 | 14.22 % | | 5 | C D C C C | F4CVQ | 81 | 6.14 % | | 99 | 5.70 % | | 6 | D C D C | 3B8M | 16 | 1.21 % | | 25 | 1.44 % | | 7 | D C D C C | 3D2AG | 14 | 1.06 % | | 17 | 0.98 % | | 8 | C D D C | E71A | 11 | 0.83 % | | 11 | 0.63 % | | 9 | C D C | B1Z | 5 | 0.38 % | | 10 | 0.58 % | | 10 | D C D C C C | 4E1AGW | 5 | 0.38 % | | 5 | 0.29 % | | 11 | C D D C C | S51RE | 3 | 0.23 % | | 4 | 0.23 % | | 12 | C D C C / D | R2ET/9 | 3 | 0.23 % | | 3 | 0.17 % | | 13 | C C D D C C | LZ30AM | 2 | 0.15 % | | 2 | 0.12 % | | 14 | D C C | 7DX | 1 | 0.08 % | | 1 | 0.06 % | | 15 | C C / C D D C | ON/S58J | 1 | 0.08 % | | 1 | 0.06 % | | 16 | C C D C / C D | KH7X/W7 | 1 | 0.08 % | | 1 | 0.06 % | | 17 | C C D C C C / D | WA1PGB/6 | 1 | 0.08 % | | 1 | 0.06 % | | 18 | C D / C D C C | Z3/K0AP | 1 | 0.08 % | | 1 | 0.06 % | |
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