These entries are queried from radb.net using whois, you can try my project getting these.
:AS205037 route: 161.51.255.0/24 descr: Kisters AG, Aachen origin: AS205037 mnt-by: MNT-RELAIX created: 2022-12-13T13:48:48Z last-modified: 2022-12-13T13:48:48Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:67c:2c6c::/48 descr: Kisters AG origin: AS205037 mnt-by: NETCOLOGNE-MNT created: 2022-12-15T10:40:40Z last-modified: 2022-12-15T10:40:40Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source