- In memory of late OM Goran YT2A, who was the first activator of 4O references.
- 4OFF-0011 first activation, on SAT, 28.09.2019. during morning hours, 40-20M CW/SSB.
- 4OFF-0017, only 137 QSOs so far, on SAT, 28.09.2019. during afternoon, 40-20M CW/SSB.
- Calls: 4O4A/P, 4O4B/P, 4O5A/P