| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K0LAF | 58 | 41.43 % | | 59 | 41.26 % | | | 2 | C D C C | K0EG | 25 | 17.86 % | | 25 | 17.48 % | | | 3 | C C D C C C | KA3CNC | 22 | 15.71 % | | 22 | 15.38 % | | | 4 | C C D C C | AA4LR | 16 | 11.43 % | | 16 | 11.19 % | | | 5 | C C D C | AA6X | 10 | 7.14 % | | 10 | 6.99 % | | | 6 | C D C | K1B | 8 | 5.71 % | | 8 | 5.59 % | | | 7 | C | N | 1 | 0.71 % | | 1 | 0.70 % | |
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