| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0AD | 103 | 45.78 % | | 144 | 47.06 % | | 2 | C C D C C | AA4CF | 40 | 17.78 % | | 54 | 17.65 % | | 3 | C C D C | AA3B | 35 | 15.56 % | | 47 | 15.36 % | | 4 | C D C C C | K1IMI | 23 | 10.22 % | | 31 | 10.13 % | | 5 | C C D C C C | EA8BQM | 14 | 6.22 % | | 18 | 5.88 % | | 6 | D C D C C | 4X6FR | 4 | 1.78 % | | 6 | 1.96 % | | 7 | D C D C | 4J4K | 2 | 0.89 % | | 2 | 0.65 % | | 8 | D C / C C D C C | 5B/RN3QO | 1 | 0.44 % | | 1 | 0.33 % | | 9 | C D D C | P33W | 1 | 0.44 % | | 1 | 0.33 % | | 10 | C C D / C C D C C C | TA2/DL2JRM | 1 | 0.44 % | | 1 | 0.33 % | | 11 | C D C C C / D | W3AKN/1 | 1 | 0.44 % | | 1 | 0.33 % | |
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