These entries are queried from radb.net using whois, you can try my project getting these.
:AS263489 route6: 2804:12a4::/32 descr: PROXY FOR OPENX CUSTOMER origin: AS263489 mnt-by: MAINT-AS263444 notify: registro [at] openx.com.br changed: registro [at] openx.com.br 20210518 remarks: Tue May 18 14:20:37 2021 source: RADB last-modified: 2023-11-13T16:05:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2804:12a4:100::/40 descr: CLARO S.A. Customer origin: AS263489 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20211223 source: RADB last-modified: 2023-11-13T16:09:04Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source