These entries are queried from radb.net using whois, you can try my project getting these.
:AS-CTB-OXMAN as-set: AS-CTB-OXMAN descr: CTB's customer, AS264323 members: AS264323 mnt-by: MAINT-AS36678 changed: liuyong [at] ctamericas.com 20231013 #19:35:01Z source: RADB last-modified: 2023-11-13T16:19:00Z