| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | RK4NAB | 6 | 42.86 % | | 37 | 41.11 % | | 2 | C C D C C | RW4NN | 4 | 28.57 % | | 28 | 31.11 % | | 3 | C D C C | R4OF | 1 | 7.14 % | | 7 | 7.78 % | | 4 | C C D C | RM4N | 1 | 7.14 % | | 7 | 7.78 % | | 5 | C D C C C | R4NAT | 1 | 7.14 % | | 4 | 4.44 % | | 6 | C C D C C / D | UA6BH/4 | 1 | 7.14 % | | 7 | 7.78 % | |
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