These entries are queried from radb.net using whois, you can try my project getting these.
:AS211503 route: 81.29.137.0/24 origin: AS211503 mnt-by: mnt-ru-imaqliq-1 mnt-by: CUBIO-RUS-MNT mnt-by: MICTIAN created: 2021-04-09T14:37:32Z last-modified: 2021-04-09T14:37:32Z 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