| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C | K0CN | 351 | 41.84 % | | 470 | 41.48 % | | | 2 | C C D C | AB0S | 164 | 19.55 % | | 218 | 19.24 % | | | 3 | C D C C C | K0TRL | 131 | 15.61 % | | 168 | 14.83 % | | | 4 | C C D C C | AB2FN | 114 | 13.59 % | | 153 | 13.50 % | | | 5 | C C D C C C | KA0PQW | 77 | 9.18 % | | 86 | 7.59 % | | | 6 | C C D C C C / D | KB1EFS/2 | 1 | 0.12 % | | 2 | 0.18 % | | | 7 | C C D / C C D C C | VE2/UR7QC | 1 | 0.12 % | | 1 | 0.09 % | |
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