These entries are queried from radb.net using whois, you can try my project getting these.
:AS199020 route: 91.211.92.0/22 descr: AVANT Ltd. origin: AS199020 mnt-by: AVANTRU-MNT created: 2020-12-07T10:24:35Z last-modified: 2020-12-08T06:07:22Z 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: not_found # No ROAs found, or RPKI validation not enabled for source route: 91.240.208.0/22 descr: AVANT Ltd. origin: AS199020 mnt-by: AVANTRU-MNT created: 2012-07-21T10:24:35Z last-modified: 2012-07-21T10:24:35Z 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: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:67c:6e0::/48 descr: AVANT-KURSK-V6 origin: AS199020 mnt-by: AVANTRU-MNT created: 2014-10-29T14:32:48Z last-modified: 2014-10-29T14:32:48Z 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: not_found # No ROAs found, or RPKI validation not enabled for source