| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0AP | 372 | 49.27 % | | 680 | 53.54 % | | 2 | C D C C C | K0AOZ | 126 | 16.69 % | | 182 | 14.33 % | | 3 | C C D C | AA0A | 124 | 16.42 % | | 215 | 16.93 % | | 4 | C C D C C | AA2LF | 75 | 9.93 % | | 120 | 9.45 % | | 5 | C C D C C C | KA1DBO | 57 | 7.55 % | | 71 | 5.59 % | | 6 | C D C C / D | W9OA/9 | 1 | 0.13 % | | 2 | 0.16 % | |
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