| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K0OTP | 51 | 35.17 % | | 51 | 34.00 % | | | 2 | C C D C C C | KA1WAL | 45 | 31.03 % | | 45 | 30.00 % | | | 3 | C D C C | K0VM | 22 | 15.17 % | | 22 | 14.67 % | | | 4 | C C D C C | AC4RC | 12 | 8.28 % | | 12 | 8.00 % | | | 5 | C C D C | AK0F | 10 | 6.90 % | | 10 | 6.67 % | | | 6 | C D C | K4K | 5 | 3.45 % | | 5 | 3.33 % | |
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