These entries are queried from radb.net using whois, you can try my project getting these.
:AS270921 route: 187.121.152.0/22 descr: CITTA to CROSS CONNECT PROVEDOR origin: AS270921 admin-c: Eduardo Fumes Parajo tech-c: Epafras Rezende Schaden mnt-by: MAINT-AS28663 changed: epafras [at] durand.com.br 20200710 source: RADB last-modified: 2023-11-13T16:07:49Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 187.121.154.0/24 descr: CLARO S.A. Customer origin: AS270921 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20220112 source: RADB last-modified: 2023-11-13T16:09:07Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2804:7388::/32 descr: CITTA to CROSS CONNECT PROVEDOR origin: AS270921 admin-c: Eduardo Fumes Parajo tech-c: Epafras Rezende Schaden mnt-by: MAINT-AS28663 changed: epafras [at] durand.com.br 20200710 source: RADB last-modified: 2023-11-13T16:07:49Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source