These entries are queried from radb.net using whois, you can try my project getting these.
:AS52508 route: 138.204.247.0/24 descr: LACNIC generated route for CABASE Camara Arg de Base de Datos y Serv en Linea origin: AS52508 remarks: LACNIC generated route for CABASE Camara Arg de Base de Datos y Serv en Linea remarks: maxLength 24 mnt-by: MNT-AR-CCAB-LACNIC changed: 20240305 source: LACNIC remarks: *************************************************** remarks: This object may have been modified remarks: For more information, please query whois.lacnic.net remarks: *************************************************** last-modified: 2024-03-05T22:15:05Z rpki-ov-state: valid route: 138.204.247.0/24 descr: CABASE-NGB-IPv4 origin: AS52508 mnt-by: MAINT-AS52376 changed: noc.hernan [at] cabase.org.ar 20201119 source: ALTDB rpki-ov-state: valid route: 201.182.143.0/24 descr: CABASE-NGB-IPv4 origin: AS52508 mnt-by: MAINT-AS52376 changed: noc.hernan [at] cabase.org.ar 20201119 source: ALTDB rpki-ov-state: valid route: 201.182.143.0/24 descr: LACNIC generated route for CABASE Camara Arg de Base de Datos y Serv en Linea origin: AS52508 remarks: LACNIC generated route for CABASE Camara Arg de Base de Datos y Serv en Linea remarks: maxLength 24 mnt-by: MNT-AR-CCAB-LACNIC changed: 20240305 source: LACNIC remarks: *************************************************** remarks: This object may have been modified remarks: For more information, please query whois.lacnic.net remarks: *************************************************** last-modified: 2024-03-05T22:15:05Z rpki-ov-state: valid route6: 2001:13c7:6019::/48 descr: CABASE-NGB-IPv6 origin: AS52508 mnt-by: MAINT-AS52376 changed: noc.hernan [at] cabase.org.ar 20201119 source: ALTDB rpki-ov-state: valid route6: 2001:13c7:6019::/48 descr: LACNIC generated route6 for CABASE Camara Arg de Base de Datos y Serv en Linea origin: AS52508 remarks: LACNIC generated route6 for CABASE Camara Arg de Base de Datos y Serv en Linea remarks: maxLength 48 mnt-by: MNT-AR-CCAB-LACNIC changed: 20240305 source: LACNIC remarks: *************************************************** remarks: This object may have been modified remarks: For more information, please query whois.lacnic.net remarks: *************************************************** last-modified: 2024-03-05T22:15:06Z rpki-ov-state: valid