These entries are queried from radb.net using whois, you can try my project getting these.
:AS262520 route: 187.87.80.0/20 descr: PROXY FOR OPENX CUSTOMER origin: AS262520 mnt-by: MAINT-AS263444 notify: registro [at] openx.com.br changed: registro [at] openx.com.br 20201030 remarks: Fri Oct 30 20:32:32 2020 source: RADB last-modified: 2023-11-13T16:02:41Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source