These entries are queried from radb.net using whois, you can try my project getting these.
:AS-IPV6CUSTOMERS as-set: AS-IPV6CUSTOMERS descr: P.O. Box 634 Blair NE 68008-0634 United States members: AS395194 admin-c: JGU119-ARIN tech-c: JGU119-ARIN tech-c: WOODA119-ARIN mnt-by: MNT-SBL-86 created: 2020-11-25T18:05:19Z last-modified: 2020-11-25T18:09:18Z source: ARIN