These entries are queried from radb.net using whois, you can try my project getting these.
:AS29600 route: 80.70.16.0/20 descr: Latvenergo origin: AS29600 mnt-by: le-noc-mnt created: 2005-01-03T07:37:07Z last-modified: 2012-01-19T09:17:26Z 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: 80.70.19.0/24 descr: Latvenergo origin: AS29600 mnt-by: latvenergo-mnt mnt-by: le-noc-mnt created: 2023-01-23T08:02:55Z last-modified: 2023-01-23T08:02:55Z 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: 80.70.28.0/24 descr: Latvenergo origin: AS29600 mnt-by: latvenergo-mnt mnt-by: le-noc-mnt created: 2023-01-23T08:00:23Z last-modified: 2023-01-23T08:05:13Z 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: 80.70.29.0/24 descr: AS AST origin: AS29600 mnt-by: latvenergo-mnt mnt-by: le-noc-mnt created: 2021-04-21T07:36:33Z last-modified: 2021-04-21T07:36:33Z 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: 83.136.136.0/21 descr: VAS Latvenergo origin: AS29600 mnt-by: latvenergo-mnt created: 2004-03-29T09:21:01Z last-modified: 2004-03-29T09:21:01Z 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: 83.136.136.0/24 descr: ro1-1 origin: AS29600 mnt-by: le-noc-mnt mnt-by: latvenergo-mnt created: 2016-01-05T14:33:34Z last-modified: 2023-01-23T07:57:49Z 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: 85.15.192.0/18 descr: Latvenergo origin: AS29600 mnt-by: latvenergo-mnt created: 2005-04-29T07:26:10Z last-modified: 2010-01-13T11:33:08Z 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: 85.15.193.0/24 descr: Latvenergo origin: AS29600 mnt-by: latvenergo-mnt mnt-by: le-noc-mnt created: 2023-01-23T08:03:56Z last-modified: 2023-01-23T08:03:56Z 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: 95.131.112.0/21 descr: Latvenergo origin: AS29600 mnt-by: le-noc-mnt created: 2013-03-11T13:13:32Z last-modified: 2013-03-11T13:13:32Z 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:a880::/29 descr: Latvenergo ipv6 1st alloc origin: AS29600 mnt-by: latvenergo-mnt mnt-by: le-noc-mnt created: 2016-03-11T09:34:48Z last-modified: 2016-03-11T09:34:48Z 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