These entries are queried from radb.net using whois, you can try my project getting these.
:AS-CTB-MultiConnect as-set: AS-CTB-MultiConnect descr: CTB's customer, AS273644 members: AS11751, AS273644 remarks: AS11751 mnt-by: MAINT-AS36678 changed: liuyong [at] ctamericas.com 20230323 #18:14:35Z source: RADB last-modified: 2023-11-13T16:15:37Z