These entries are queried from radb.net using whois, you can try my project getting these.
:AS399559 route6: 2606:6e40::/32 origin: AS399559 descr: Alpine Communications PO Box 1008 923 Humphrey St. Elkader, Iowa 52043 admin-c: HOPPC-ARIN tech-c: VNC2-ARIN mnt-by: MNT-ALPINE-2 created: 2021-08-18T21:00:31Z last-modified: 2021-08-18T21:00:31Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source