| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K0ANT | 190 | 38.70 % | | 192 | 36.09 % | | | 2 | C C D C C C | KA1KNW | 104 | 21.18 % | | 104 | 19.55 % | | | 3 | C D C C | K0OZ | 90 | 18.33 % | | 91 | 17.11 % | | | 4 | C C D C C | AA2BJ | 54 | 11.00 % | | 54 | 10.15 % | | | 5 | C C D C | AF2A | 32 | 6.52 % | | 32 | 6.02 % | | | 6 | C D C | K1B | 20 | 4.07 % | | 20 | 3.76 % | | | 7 | C D C C D C | K8GE3A | 1 | 0.20 % | | 1 | 0.19 % | |
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