These entries are queried from radb.net using whois, you can try my project getting these.
:AS270963 route: 189.50.60.0/22 descr: PROXY FOR OPENX CUSTOMER origin: AS270963 mnt-by: MAINT-AS263444 notify: registro [at] openx.com.br changed: registro [at] openx.com.br 20210303 remarks: Wed Mar 3 21:07:20 2021 source: RADB last-modified: 2023-11-13T16:04:18Z rpki-ov-state: valid route6: 2804:742c::/32 origin: AS270963 descr: Proxy registered by Inforbarra Telecom tech-c: NOC INFORBARRA notify: noc [at] inforbarra.com.br mnt-by: MAINT-AS263903 changed: danilo.alves [at] inforbarra.com.br 20211223 #19:53:00Z source: RADB last-modified: 2023-11-13T16:09:04Z rpki-ov-state: valid