These entries are queried from radb.net using whois, you can try my project getting these.
:AS397187 route: 8.41.52.0/22 descr: Proxy registration to prevent harm from ARIN-NONAUTH shutdown origin: AS397187 mnt-by: MAINT-AS7034 changed: kennethfinnegan2007 [at] gmail.com 20220404 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.47.96.0/20 descr: NHN Global origin: AS397187 mnt-by: MAINT-AS397187 changed: kpack [at] us.ntt.net 20190528 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source