| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K3HKI | 26 | 37.68 % | | 26 | 36.62 % | | | 2 | C C D C C C | KB4MDD | 19 | 27.54 % | | 20 | 28.17 % | | | 3 | C D C C | K0NJ | 14 | 20.29 % | | 15 | 21.13 % | | | 4 | C C D C C | AB4ZB | 5 | 7.25 % | | 5 | 7.04 % | | | 5 | C C D C | NA9U | 4 | 5.80 % | | 4 | 5.63 % | | | 6 | C D C | W9P | 1 | 1.45 % | | 1 | 1.41 % | |
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