| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C | K0AD | 168 | 32.56 % | | 193 | 32.99 % | | | 2 | C D C C C | K0EWS | 154 | 29.84 % | | 173 | 29.57 % | | | 3 | C C D C C C | CT1DRB | 67 | 12.98 % | | 69 | 11.79 % | | | 4 | C C D C | AA3B | 59 | 11.43 % | | 67 | 11.45 % | | | 5 | C C D C C | AA1UC | 54 | 10.47 % | | 61 | 10.43 % | | | 6 | C D C | K1P | 13 | 2.52 % | | 17 | 2.91 % | | | 7 | C D C C C / D | K2YNT/2 | 1 | 0.19 % | | 1 | 0.17 % | |
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