These entries are queried from radb.net using whois, you can try my project getting these.
:AS51716 route: 91.221.42.0/24 descr: Opened Joint-Stock Company Moscow River Shipping origin: AS51716 mnt-by: MNT-STRL created: 2020-05-20T13:02:40Z last-modified: 2020-05-20T13:02:40Z 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