These entries are queried from radb.net using whois, you can try my project getting these.
:AS56813 route: 91.237.88.0/23 descr: SCHLUNDTECH-NET-PI origin: AS56813 mnt-by: IX1-MNT notify: ripe [at] internetx.de created: 2012-03-27T13:44:21Z last-modified: 2020-05-19T12:29:12Z 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 route6: 2001:67c:299c::/48 descr: SCHLUNDTECH-IPv6-NET-PI origin: AS56813 mnt-by: IX1-MNT notify: ripe [at] internetx.de created: 2012-06-01T13:24:46Z last-modified: 2020-05-19T12:50:53Z 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