These entries are queried from radb.net using whois, you can try my project getting these.
:AS48471 route: 91.211.12.0/22 descr: OPTIK-UA route origin: AS48471 mnt-by: OPTIK-UA-MNT created: 2008-12-01T20:11:37Z last-modified: 2022-07-06T09:22:23Z 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