| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
|---|
| 1 | C D C C C | K0AJW | 370 | 31.79 % | | 421 | 30.64 % | | | 2 | C D C C | K0EU | 306 | 26.29 % | | 376 | 27.37 % | | | 3 | C C D C C C | KA0DOS | 215 | 18.47 % | | 227 | 16.52 % | | | 4 | C C D C C | AA2BJ | 127 | 10.91 % | | 138 | 10.04 % | | | 5 | C C D C | AA3B | 109 | 9.36 % | | 125 | 9.10 % | | | 6 | C D C | K0M | 34 | 2.92 % | | 42 | 3.06 % | | | 7 | C D C C C C | K5WPOP | 1 | 0.09 % | | 1 | 0.07 % | | | 8 | C D D C | W32A | 1 | 0.09 % | | 1 | 0.07 % | | | 9 | C C D C C / D | WW2OK/5 | 1 | 0.09 % | | 1 | 0.07 % | |
|