These entries are queried from radb.net using whois, you can try my project getting these.
:AS-BIGTELECOM as-set: AS-BIGTELECOM descr: BIG Telecom ASes members: AS35810 members: AS50212 members: AS6679 members: as-TTK-Ltd members: AS-ASTEIS members: AS-TNC members: AS-TELINCOM members: AS202051 members: AS198675 members: AS57652 members: AS49160 members: AS204921 members: AS-MIGRAPH members: AS204985 members: AS28738 tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: BIGTELECOM-MNT created: 2008-06-16T08:20:53Z last-modified: 2021-03-11T14:34:23Z 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: ****************************