These entries are queried from radb.net using whois, you can try my project getting these.
:AS-TTK-RTL-SAKH as-set: AS-TTK-RTL-SAKH descr: TTK-Retail as-set object for SakhalinTTK members: AS15774 members: AS29425 members: AS196721 members: AS62266 admin-c: DUMY-RIPE tech-c: DUMY-RIPE mnt-by: TRANSTELECOM-MNT created: 2011-07-29T10:36:34Z last-modified: 2020-06-08T10:26:38Z 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: ****************************