These entries are queried from radb.net using whois, you can try my project getting these.
:AS-SIGMA-TELECOM as-set: AS-SIGMA-TELECOM descr: ASs Routed by Sigma Telecom members: AS60388 members: AS197292 members: AS12879 members: AS60740 members: AS205062 members: AS43859 members: AS44113 members: AS-HYPERNET members: AS-NTEC members: AS209248 members: AS208129 members: AS-SET-SVEN members: AS-DATA-LINE tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: SIGMATELECOM-MNT created: 2013-11-19T11:41:03Z last-modified: 2023-04-17T13:06:44Z 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: ****************************