These entries are queried from radb.net using whois, you can try my project getting these.
:AS61839 route: 201.148.228.0/22 descr: ITX-SAMM origin: AS61839 mnt-by: MAINT-AS18678 changed: noc [at] internexa.com 20181015 #17:28:07Z source: RADB last-modified: 2023-11-13T15:54:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 201.148.228.0/23 descr: CLARO S.A. Customer origin: AS61839 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20201127 source: RADB last-modified: 2023-11-13T16:03:02Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 201.148.230.0/23 descr: CLARO S.A. Customer origin: AS61839 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20201127 source: RADB last-modified: 2023-11-13T16:03:02Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2804:1a24::/32 descr: ITX-SAMM origin: AS61839 mnt-by: MAINT-AS18678 changed: noc [at] internexa.com 20181015 #17:35:58Z source: RADB last-modified: 2023-11-13T15:54:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2804:1a24::/32 descr: Proxy for DL Informatica origin: AS61839 remarks: New Proxy route for DL Informatica notify: diego [at] fastnet.net.br mnt-by: MAINT-AS52531 changed: rphilips [at] us.ntt.net 20180109 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source