| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K5FD | 40 | 32.26 % | | 41 | 32.80 % | | 2 | C D C C C | K0KKV | 31 | 25.00 % | | 31 | 24.80 % | | 3 | C C D C C C | KB0TLL | 22 | 17.74 % | | 22 | 17.60 % | | 4 | C C D C | AC6P | 13 | 10.48 % | | 13 | 10.40 % | | 5 | C C D C C | AA5AR | 9 | 7.26 % | | 9 | 7.20 % | | 6 | C D C | K5T | 7 | 5.65 % | | 7 | 5.60 % | | 7 | C D C C / D | W1AW/3 | 2 | 1.61 % | | 2 | 1.60 % | |
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