| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0DCA | 38 | 47.50 % | | 40 | 48.19 % | | 2 | C D C C | K4TG | 17 | 21.25 % | | 18 | 21.69 % | | 3 | C C D C | KA5B | 9 | 11.25 % | | 9 | 10.84 % | | 4 | C C D C C | AB4ZB | 8 | 10.00 % | | 8 | 9.64 % | | 5 | C C D C C C | KB2RVB | 6 | 7.50 % | | 6 | 7.23 % | | 6 | C D C | N4E | 2 | 2.50 % | | 2 | 2.41 % | |
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