Logbook dei QSO della stazione IU0OPT
- Member of LotW https://lotw.arrl.org/
- Member of https://www.eqsl.cc/Member.cfm?IU0OPT
- Listed on QRZ https://logbook.qrz.com/lbstat/IU0OPT/
- Listed on HRDLOG http://www.hrdlog.net/ViewLogbook.aspx?user=IU0OPT
- Member of FT8DMC https://ft8dmc.eu/