These entries are queried from radb.net using whois, you can try my project getting these.
:AS51134 route: 91.216.168.0/24 descr: INTACTO-1-PI-MAI-CZ origin: AS51134 mnt-by: MASTER-MNT created: 2010-06-10T18:43:15Z last-modified: 2010-06-10T18:43:15Z 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: 91.229.24.0/24 descr: TRITON-1-PI-SK origin: AS51134 mnt-by: MASTER-MNT mnt-by: cz-kajot-1-mnt created: 2011-06-14T09:13:27Z last-modified: 2020-07-16T09:12:16Z 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: 91.230.144.0/24 descr: INTACTO-2-PI-MAI-CZ origin: AS51134 mnt-by: MASTER-MNT created: 2011-07-13T12:29:35Z last-modified: 2011-07-13T12:29:35Z 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: 185.252.196.0/22 origin: AS51134 mnt-by: cz-kajot-1-mnt created: 2018-06-12T11:33:21Z last-modified: 2018-06-12T11:33:21Z 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 route6: 2a01:430:11::/48 descr: MASTER-ESG-SPECIFIC-MAI-CZ origin: AS51134 mnt-by: MASTER-MNT created: 2018-09-07T11:38:50Z last-modified: 2018-09-07T11:38:50Z 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 route6: 2a0c:3240::/29 origin: AS51134 mnt-by: cz-kajot-1-mnt created: 2018-09-06T08:27:22Z last-modified: 2018-09-06T08:27:22Z 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