| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0LIR | 13 | 28.26 % | | 13 | 27.66 % | | 2 | C C D C C C | KC4EMG | 11 | 23.91 % | | 11 | 23.40 % | | 3 | C D C C | K4CQ | 10 | 21.74 % | | 10 | 21.28 % | | 4 | C C D C C | AA9UF | 4 | 8.70 % | | 5 | 10.64 % | | 5 | C D C | K5Z | 4 | 8.70 % | | 4 | 8.51 % | | 6 | C C D C | AC7R | 4 | 8.70 % | | 4 | 8.51 % | |
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