| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K2DSW | 12 | 29.27 % | | 12 | 27.27 % | | 2 | C D C C | K2UT | 11 | 26.83 % | | 11 | 25.00 % | | 3 | C C D C C | AA4IB | 10 | 24.39 % | | 10 | 22.73 % | | 4 | C C D C C C | KA3PMW | 6 | 14.63 % | | 6 | 13.64 % | | 5 | C C D C | AE4S | 2 | 4.88 % | | 2 | 4.55 % | |
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