| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | G0FHM | 135 | 34.88 % | | 135 | 31.76 % | | 2 | C D C C | K0GQ | 86 | 22.22 % | | 88 | 20.71 % | | 3 | C C D C C C | IK4LZH | 65 | 16.80 % | | 68 | 16.00 % | | 4 | C C D C C | AA4DD | 46 | 11.89 % | | 47 | 11.06 % | | 5 | C C D C | AJ4A | 36 | 9.30 % | | 38 | 8.94 % | | 6 | C D C | K1B | 18 | 4.65 % | | 18 | 4.24 % | | 7 | C D D C C | K40GB | 1 | 0.26 % | | 1 | 0.24 % | |
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