These entries are queried from radb.net using whois, you can try my project getting these.
:AS51824 route: 91.221.84.0/23 descr: Alternativa ISP route object origin: AS51824 mnt-by: MNT-ALTERNATIVA created: 2011-01-11T15:07:41Z last-modified: 2011-01-11T15:07:41Z 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: valid route: 91.221.84.0/24 descr: ISP Alternativa main route object origin: AS51824 mnt-by: MNT-ALTERNATIVA created: 2014-10-10T08:07:12Z last-modified: 2014-10-10T08:07:12Z 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: valid route: 91.221.85.0/24 descr: ISP Alternativa main route object origin: AS51824 mnt-by: MNT-ALTERNATIVA created: 2014-10-10T08:08:07Z last-modified: 2014-10-10T08:08:07Z 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: valid route: 192.162.196.0/23 origin: AS51824 mnt-by: MNT-ALTERNATIVA created: 2022-11-16T10:51:53Z last-modified: 2022-11-16T10:52:39Z 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