| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CT1BQH | 566 | 42.59 % | | 743 | 43.71 % | | 2 | C C D C C | AB5EB | 367 | 27.61 % | | 484 | 28.47 % | | 3 | C D C C C | F1NNI | 164 | 12.34 % | | 184 | 10.82 % | | 4 | C C D C | AA3B | 76 | 5.72 % | | 81 | 4.76 % | | 5 | C D C C | E7CW | 74 | 5.57 % | | 88 | 5.18 % | | 6 | C D D C | E72U | 16 | 1.20 % | | 20 | 1.18 % | | 7 | C D D C C | E44RU | 10 | 0.75 % | | 12 | 0.71 % | | 8 | D C D C C | 4O3RB | 9 | 0.68 % | | 16 | 0.94 % | | 9 | D C D C | 3Z6M | 6 | 0.45 % | | 6 | 0.35 % | | 10 | C C D C C C / C C C | EA7HCB/QRP | 6 | 0.45 % | | 24 | 1.41 % | | 11 | D C D C C C | 2E0CVN | 6 | 0.45 % | | 8 | 0.47 % | | 12 | C C D C C / C C C | DF3FY/QRP | 3 | 0.23 % | | 3 | 0.18 % | | 13 | C C D D C | HG45F | 3 | 0.23 % | | 3 | 0.18 % | | 14 | C C D D C C C C | DF70DARC | 2 | 0.15 % | | 2 | 0.12 % | | 15 | C C D C C C / C | DL8RBR/P | 2 | 0.15 % | | 2 | 0.12 % | | 16 | C C D D D D C C C | YP2020HNY | 2 | 0.15 % | | 3 | 0.18 % | | 17 | C D C C C / C | F5MWA/M | 2 | 0.15 % | | 3 | 0.18 % | | 18 | C C D D D C C | HF100BY | 2 | 0.15 % | | 2 | 0.12 % | | 19 | C C D D D D C C | LZ1908IK | 2 | 0.15 % | | 4 | 0.24 % | | 20 | D C D D C | 4U25B | 1 | 0.08 % | | 1 | 0.06 % | | 21 | C C D C C C / C C C / C | OH6UAV/QRP/P | 1 | 0.08 % | | 1 | 0.06 % | | 22 | C C D D D C C C | OL725PLZ | 1 | 0.08 % | | 2 | 0.12 % | | 23 | C C / C C D C C C / C | ON/PD0RWL/P | 1 | 0.08 % | | 1 | 0.06 % | | 24 | C C / C C D C C | ON/PD4MB | 1 | 0.08 % | | 1 | 0.06 % | | 25 | C D C C / C C C | R5QO/QRP | 1 | 0.08 % | | 1 | 0.06 % | | 26 | C D D C C C | S56UVB | 1 | 0.08 % | | 1 | 0.06 % | | 27 | C C / C D C C C | SP/I4ZSQ | 1 | 0.08 % | | 1 | 0.06 % | | 28 | C C D C C / D | TA2AO/4 | 1 | 0.08 % | | 1 | 0.06 % | | 29 | C C D D C C C / C | TM70IPA/P | 1 | 0.08 % | | 1 | 0.06 % | | 30 | D C D D C C C | 3Z20HNY | 1 | 0.08 % | | 1 | 0.06 % | |
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