These entries are queried from radb.net using whois, you can try my project getting these.
:AS-LEITWERT as-set: AS-LEITWERT members: AS39063 members: AS29108 org: ORG-LU18-RIPE admin-c: DUMY-RIPE tech-c: DUMY-RIPE mnt-by: LEITWERT-MNT created: 2015-04-01T19:30:06Z last-modified: 2020-01-22T08:29:44Z 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: ****************************