| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K9BY | 20 | 38.46 % | | 22 | 36.67 % | | 2 | C D C C C | K2AUD | 17 | 32.69 % | | 22 | 36.67 % | | 3 | C D C | K1R | 5 | 9.62 % | | 5 | 8.33 % | | 4 | C C D C C | AA4NC | 4 | 7.69 % | | 4 | 6.67 % | | 5 | C C D C C C | KM4UGX | 3 | 5.77 % | | 3 | 5.00 % | | 6 | C C D C | KT9Y | 2 | 3.85 % | | 3 | 5.00 % | | 7 | C D C C C C | W4JJNB | 1 | 1.92 % | | 1 | 1.67 % | |
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