These entries are queried from radb.net using whois, you can try my project getting these.
:AS393996 route: 208.90.68.0/22 origin: AS393996 descr: 3005 Deziel Drive Windsor ON N8W 5A5 Canada admin-c: SKA58-ARIN tech-c: GTS7-ARIN mnt-by: MNT-GOVI created: 2020-12-17T16:52:47Z last-modified: 2020-12-17T16:52:47Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2602:fe74::/36 origin: AS393996 descr: 3005 Deziel Drive Windsor ON N8W 5A5 Canada admin-c: SKA58-ARIN tech-c: GTS7-ARIN mnt-by: MNT-GOVI created: 2020-12-17T16:53:27Z last-modified: 2020-12-17T16:53:27Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source