| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K0ANT | 570 | 33.18 % | | 705 | 31.15 % | | | 2 | C D C C | K0AD | 405 | 23.57 % | | 575 | 25.41 % | | | 3 | C C D C C C | CT1DRB | 303 | 17.64 % | | 322 | 14.23 % | | | 4 | C C D C C | AA1UC | 204 | 11.87 % | | 234 | 10.34 % | | | 5 | C C D C | AA3B | 170 | 9.90 % | | 209 | 9.24 % | | | 6 | C D C | K1B | 62 | 3.61 % | | 86 | 3.80 % | | | 7 | C D C C / C D | K2NV/V3 | 1 | 0.06 % | | 1 | 0.04 % | | | 8 | C D C C C / D | K2YNT/2 | 1 | 0.06 % | | 2 | 0.09 % | | | 9 | C D D C C | K30MT | 1 | 0.06 % | | 1 | 0.04 % | | | 10 | C D C C C D C C C | W2LVK3MJW | 1 | 0.06 % | | 1 | 0.04 % | |
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