These entries are queried from radb.net using whois, you can try my project getting these.
:AS-AB as-set: as-ab descr: Asset Black members: AS398202 members: AS398797 admin-c: NOC33045-ARIN tech-c: NOC33045-ARIN notify: noc [at] assetblack.com mnt-by: MAINT-AS398202 changed: noc [at] assetblack.com 20210131 source: NTTCOM as-set: as-ab descr: Asset Black members: AS398202 AS35885 mnt-by: MAINT-AS398202 changed: josh [at] nubesec.com 20231129 # 1647Z source: RADB last-modified: 2023-11-29T16:47:27Z