| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K3CSG | 26 | 41.94 % | | 28 | 43.75 % | | 2 | C C D C C C | KC4EOG | 12 | 19.35 % | | 12 | 18.75 % | | 3 | C D C C | K1AA | 11 | 17.74 % | | 11 | 17.19 % | | 4 | C C D C C | AA4PL | 9 | 14.52 % | | 9 | 14.06 % | | 5 | C C D C | KS3N | 4 | 6.45 % | | 4 | 6.25 % | |
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