| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K0LIR | 77 | 35.98 % | | 78 | 33.62 % | | | 2 | C D C C | K0VM | 54 | 25.23 % | | 57 | 24.57 % | | | 3 | C C D C C C | KA5CRL | 43 | 20.09 % | | 43 | 18.53 % | | | 4 | C C D C C | AB4KT | 14 | 6.54 % | | 14 | 6.03 % | | | 5 | C C D C | KA4J | 13 | 6.07 % | | 13 | 5.60 % | | | 6 | C D C | K4B | 12 | 5.61 % | | 13 | 5.60 % | | | 7 | D D D D D C | 11111W | 1 | 0.47 % | | 1 | 0.43 % | |
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