| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K0LIR | 62 | 34.07 % | | 63 | 30.29 % | | | 2 | C C D C C C | KA5CRL | 39 | 21.43 % | | 40 | 19.23 % | | | 3 | C D C C | K0FV | 36 | 19.78 % | | 38 | 18.27 % | | | 4 | C C D C | AD0B | 17 | 9.34 % | | 17 | 8.17 % | | | 5 | C C D C C | AC5LC | 15 | 8.24 % | | 15 | 7.21 % | | | 6 | C D C | K5N | 13 | 7.14 % | | 14 | 6.73 % | |
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