These entries are queried from radb.net using whois, you can try my project getting these.
:AS-RTBHOUSE-AMS as-set: AS-RTBHOUSE-AMS tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: mnt-cy-rtbmarketing-1 created: 2018-03-20T16:47:42Z last-modified: 2024-03-25T06:33:43Z source: RIPE members: AS204995 members: AS206502 descr: RTB HOUSE objects in AMS 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: ****************************