| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0EOR | 16 | 28.07 % | | 16 | 25.81 % | | 2 | C D C C | K2UT | 14 | 24.56 % | | 14 | 22.58 % | | 3 | C C D C C C | KA3PMW | 13 | 22.81 % | | 13 | 20.97 % | | 4 | C C D C C | AA4IB | 9 | 15.79 % | | 9 | 14.52 % | | 5 | C C D C | AE4S | 4 | 7.02 % | | 4 | 6.45 % | | 6 | C D C | W2C | 1 | 1.75 % | | 1 | 1.61 % | |
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