| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CT1EEK | 18 | 43.90 % | | 18 | 43.90 % | | 2 | C C D C C | RA0AY | 16 | 39.02 % | | 16 | 39.02 % | | 3 | C C D C | UA8A | 4 | 9.76 % | | 4 | 9.76 % | | 4 | C D C C | R7MM | 2 | 4.88 % | | 2 | 4.88 % | | 5 | D C D C C | 4L1BR | 1 | 2.44 % | | 1 | 2.44 % | |
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