These entries are queried from radb.net using whois, you can try my project getting these.
:AS-SONDERCLOUD-ALL as-set: AS-SONDERCLOUD-ALL descr: SONDERCLOUD LIMITED members: AS133199 members: AS134696 members: AS133861 members: AS139659 members: AS208504 members: AS209104 members: AS198087 members: AS211954 members: AS212524 members: AS198487 members: AS151630 mnt-by: MAINT-AS133199 changed: zhen.ken [at] sondercloud.com 20240116 # 0859Z source: RADB last-modified: 2024-01-16T08:59:39Z