| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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| 1 | C D C C | K0AD | 255 | 34.00 % | | 332 | 35.02 % | | | 2 | C D C C C | K0ANT | 211 | 28.13 % | | 249 | 26.27 % | | | 3 | C C D C | AA3B | 89 | 11.87 % | | 108 | 11.39 % | | | 4 | C C D C C C | CT1DRB | 84 | 11.20 % | | 91 | 9.60 % | | | 5 | C C D C C | AA1UC | 83 | 11.07 % | | 94 | 9.92 % | | | 6 | C D C | K1C | 24 | 3.20 % | | 29 | 3.06 % | | | 7 | D D D D D C | 11111W | 1 | 0.13 % | | 1 | 0.11 % | | | 8 | C D C C / C D | K2NV/V3 | 1 | 0.13 % | | 1 | 0.11 % | | | 9 | C D C C C / D | K2YNT/2 | 1 | 0.13 % | | 2 | 0.21 % | | | 10 | C | N | 1 | 0.13 % | | 1 | 0.11 % | |
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