| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0CN | 133 | 35.00 % | | 133 | 34.82 % | | 2 | C C D C | AA1J | 83 | 21.84 % | | 85 | 22.25 % | | 3 | C D C C C | K0AOZ | 74 | 19.47 % | | 74 | 19.37 % | | 4 | C C D C C | AA0AW | 43 | 11.32 % | | 43 | 11.26 % | | 5 | C C D C C C | CE2MVF | 41 | 10.79 % | | 41 | 10.73 % | | 6 | C D D C C | J68HF | 2 | 0.53 % | | 2 | 0.52 % | | 7 | D C D C | 4M1K | 1 | 0.26 % | | 1 | 0.26 % | | 8 | C D C C C / D | N7RCS/7 | 1 | 0.26 % | | 1 | 0.26 % | | 9 | C D / C C D C C C | P4/DL6RAI | 1 | 0.26 % | | 1 | 0.26 % | | 10 | C C D / C C D C C | TI8/AA8HH | 1 | 0.26 % | | 1 | 0.26 % | |
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