These entries are queried from radb.net using whois, you can try my project getting these.
:AS271420 route: 181.233.44.0/22 descr: PROXY FOR OPENX CUSTOMER origin: AS271420 mnt-by: MAINT-AS263444 notify: registro [at] openx.com.br changed: registro [at] openx.com.br 20211216 remarks: Thu Dec 16 13:36:12 2021 source: RADB last-modified: 2023-11-13T16:09:03Z rpki-ov-state: valid route6: 2804:7b40::/32 descr: PROXY FOR OPENX CUSTOMER origin: AS271420 mnt-by: MAINT-AS263444 notify: registro [at] openx.com.br changed: registro [at] openx.com.br 20211215 remarks: Wed Dec 15 14:40:50 2021 source: RADB last-modified: 2023-11-13T16:09:03Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source