| UTC | |
| USA Pacific | |
| Japan |
| Date | Call | Grid | Mode | Band | Frequency |
|---|---|---|---|---|---|
| 29 Mar 11 | KL2ZZ/AG | CO28rj | PSK31 | 40m | 7.036365 |
| 20 Feb 10 | KL7WV | CO28sg | CW | 80m | 3.513990 |
| 14 Feb 10 | KL7IWC | CO28qi | RTTY | 80m | 3.583567 |
| 14 Feb 09 | KL7IWC | CO28qi | RTTY | 20m | 14.088293 |
| 28 Mar 08 | KL7IWC | CO28qi | PSK31 | 80m | 3.581542 |