These entries are queried from radb.net using whois, you can try my project getting these.
:AS395599 route: 52.144.63.0/24 origin: AS395599 descr: Alder INC admin-c: WHITE1241-ARIN tech-c: WHITE1241-ARIN mnt-by: MNT-AHL-268 created: 2022-02-17T21:04:27Z last-modified: 2022-02-17T21:04:27Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source