These entries are queried from radb.net using whois, you can try my project getting these.
:AS270597 route: 187.17.140.0/22 descr: PROXY FOR OPENX CUSTOMER origin: AS270597 mnt-by: MAINT-AS263444 notify: registro [at] openx.com.br changed: registro [at] openx.com.br 20200508 remarks: Fri May 8 17:02:08 2020 source: RADB last-modified: 2023-11-13T16:00:39Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 187.17.143.0/24 descr: CLARO S.A. Customer origin: AS270597 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20211116 source: RADB last-modified: 2023-11-13T16:08:40Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2804:6e70::/32 descr: PROXY FOR OPENX CUSTOMER origin: AS270597 mnt-by: MAINT-AS263444 notify: registro [at] openx.com.br changed: registro [at] openx.com.br 20200505 remarks: Tue May 5 15:49:45 2020 source: RADB last-modified: 2023-11-13T16:00:38Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source