| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K0AMC | 65 | 38.01 % | | 67 | 38.73 % | | | 2 | C C D C C C | KA2OEE | 38 | 22.22 % | | 38 | 21.97 % | | | 3 | C D C C | K1LX | 27 | 15.79 % | | 27 | 15.61 % | | | 4 | C C D C C | AA5KC | 24 | 14.04 % | | 24 | 13.87 % | | | 5 | C C D C | KA4J | 11 | 6.43 % | | 11 | 6.36 % | | | 6 | C D C | K5W | 5 | 2.92 % | | 5 | 2.89 % | | | 7 | C D C C / C | G2NV/P | 1 | 0.58 % | | 1 | 0.58 % | |
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