These entries are queried from radb.net using whois, you can try my project getting these.
:AS271399 route: 181.233.64.0/22 descr: PROXY FOR OPENX CUSTOMER origin: AS271399 mnt-by: MAINT-AS263444 notify: registro [at] openx.com.br changed: registro [at] openx.com.br 20211217 remarks: Fri Dec 17 18:25:15 2021 source: RADB last-modified: 2023-11-13T16:09:04Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2804:7ae8::/32 descr: SGPIEDADENE origin: AS271399 admin-c: Eduardo Fumes Parajo tech-c: Epafras Rezende Schaden mnt-by: MAINT-AS22356 changed: epafras [at] durand.com.br 20201216 source: RADB last-modified: 2023-11-13T16:03:08Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source