These entries are queried from radb.net using whois, you can try my project getting these.
:AS-AMAZON-EU as-set: AS-AMAZON-EU tech-c: DUMY-RIPE admin-c: DUMY-RIPE mnt-by: KATERINA-MNT created: 2022-10-23T19:05:36Z last-modified: 2022-10-23T19:05:36Z 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: **************************** as-set: AS-AMAZON-EU descr: Amazon EU ASN members: AS39111,AS9059 notify: noc [at] amazon.com mnt-by: MAINT-AS16509 changed: noc [at] amazon.com 20150123 #12:25:04Z source: RADB last-modified: 2023-11-13T15:47:49Z