These entries are queried from radb.net using whois, you can try my project getting these.
:AS263598 route: 177.136.224.0/19 descr: PROXY FOR OPENX CUSTOMER origin: AS263598 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 route6: 2804:fac::/32 descr: Cemig origin: AS263598 mnt-by: MAINT-AS18678 changed: adminred [at] internexa.com 20170203 #13:53:20Z source: RADB last-modified: 2023-11-13T15:50:36Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source