| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K0BIE | 61 | 38.13 % | | 62 | 33.16 % | | | 2 | C D C C | K1II | 33 | 20.63 % | | 34 | 18.18 % | | | 3 | C C D C C | AB5UE | 28 | 17.50 % | | 29 | 15.51 % | | | 4 | C C D C C C | KA3PMW | 22 | 13.75 % | | 22 | 11.76 % | | | 5 | C C D C | AA4S | 11 | 6.88 % | | 14 | 7.49 % | | | 6 | C D C | K4R | 5 | 3.13 % | | 5 | 2.67 % | |
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