These entries are queried from radb.net using whois, you can try my project getting these.
:AS-SEVEREN-TELECOM-V6 as-set: AS-SEVEREN-TELECOM-V6 descr: IPv6 announce via JSC "Severen-Telecom" members: AS24739 members: AS60832 members: AS58042 members: AS207056 members: AS-SENATOR members: AS34944 members: AS208178 members: AS201511 members: AS210223 members: AS211400 tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: LIR-SEVEREN-MNT created: 2015-01-15T13:44:53Z last-modified: 2021-09-07T10:45:17Z 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: ****************************