| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | EA1EWY | 70 | 46.67 % | | 70 | 43.48 % | | 2 | C C D C C | AC4CA | 38 | 25.33 % | | 42 | 26.09 % | | 3 | C C D C | EM2G | 15 | 10.00 % | | 19 | 11.80 % | | 4 | C D C C C | G0MBA | 10 | 6.67 % | | 11 | 6.83 % | | 5 | C D C C | K4FX | 9 | 6.00 % | | 11 | 6.83 % | | 6 | D C D C C | 4Z4DX | 2 | 1.33 % | | 2 | 1.24 % | | 7 | C C D D C C | HF15UM | 1 | 0.67 % | | 1 | 0.62 % | | 8 | D C D C | 3Z6O | 1 | 0.67 % | | 1 | 0.62 % | | 9 | C D C C / D | N2HR/3 | 1 | 0.67 % | | 1 | 0.62 % | | 10 | C D D C | S56A | 1 | 0.67 % | | 1 | 0.62 % | | 11 | C D D C C | S57WO | 1 | 0.67 % | | 1 | 0.62 % | | 12 | C C D C C C / D | WB2RHM/4 | 1 | 0.67 % | | 1 | 0.62 % | |
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