These entries are queried from radb.net using whois, you can try my project getting these.
:AS-AVANTRU as-set: AS-AVANTRU members: AS199020 members: AS203791 members: AS208762 members: AS57233 members: AS34033 members: AS20772 members: AS206419 members: AS44011 members: AS41599 members: AS212456 members: AS44276 members: AS50037 members: AS211150 members: AS48673 descr: AVANT Ltd. tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: AVANTRU-MNT created: 2012-07-21T11:00:43Z last-modified: 2024-04-01T08:24:12Z 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: ****************************