These entries are queried from radb.net using whois, you can try my project getting these.
:AS-BTK as-set: AS-BTK descr: Belgorod telecommunication AS list members: AS62247 members: AS208541 tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: BTK-MNT created: 2016-03-22T12:14:14Z last-modified: 2022-12-05T10:27:26Z 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: ****************************