| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K4MN | 18 | 40.00 % | | 19 | 41.30 % | | 2 | C D C C C | K3KLB | 14 | 31.11 % | | 14 | 30.43 % | | 3 | C C D C C | AA4RV | 7 | 15.56 % | | 7 | 15.22 % | | 4 | C C D C | AJ4A | 3 | 6.67 % | | 3 | 6.52 % | | 5 | C C D C C C | KC5OLO | 3 | 6.67 % | | 3 | 6.52 % | |
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