| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0EJ | 37 | 29.60 % | | 37 | 28.91 % | | 2 | C D C C C | K0ACP | 30 | 24.00 % | | 30 | 23.44 % | | 3 | C C D C | AA3B | 25 | 20.00 % | | 26 | 20.31 % | | 4 | C C D C C | AA2IL | 18 | 14.40 % | | 19 | 14.84 % | | 5 | C C D C C C | KA6JLT | 14 | 11.20 % | | 15 | 11.72 % | | 6 | C D C C C / D | N5EES/2 | 1 | 0.80 % | | 1 | 0.78 % | |
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