These entries are queried from radb.net using whois, you can try my project getting these.
:AS51424 route: 91.218.232.0/22 descr: Route22 origin: AS51424 mnt-by: SPERL-MNT created: 2012-03-28T12:55:03Z last-modified: 2012-03-28T12:55:03Z 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 route: 91.218.232.0/23 descr: Jiri Sperl route origin: AS51424 mnt-by: SPERL-MNT created: 2010-08-30T14:32:59Z last-modified: 2010-08-30T14:32:59Z 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 route: 212.4.132.0/24 origin: AS51424 mnt-by: MNET-IP-MNT created: 2020-11-24T08:54:48Z last-modified: 2020-11-24T08:54:48Z 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: valid route: 212.96.184.0/24 origin: AS51424 mnt-by: MNET-IP-MNT created: 2020-11-24T08:57:23Z last-modified: 2020-11-24T08:57:23Z 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: 213.211.36.0/24 origin: AS51424 mnt-by: MNET-IP-MNT created: 2020-11-24T08:58:43Z last-modified: 2020-11-24T08:58:43Z 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