| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K0ARY | 40 | 31.25 % | | 40 | 30.77 % | | | 2 | C D C C | K0SI | 35 | 27.34 % | | 35 | 26.92 % | | | 3 | C C D C C C | KA4JJD | 21 | 16.41 % | | 21 | 16.15 % | | | 4 | C C D C | AB0O | 14 | 10.94 % | | 14 | 10.77 % | | | 5 | C C D C C | AA4RV | 10 | 7.81 % | | 10 | 7.69 % | | | 6 | C D C | K4E | 6 | 4.69 % | | 6 | 4.62 % | | | 7 | C D C C C C | K5WPOP | 1 | 0.78 % | | 1 | 0.77 % | | | 8 | C C D C C / D | WW2OK/5 | 1 | 0.78 % | | 1 | 0.77 % | |
|