These entries are queried from radb.net using whois, you can try my project getting these.
:AS395257 route: 8.39.160.0/24 descr: Proxy registration to prevent harm from ARIN-NONAUTH shutdown origin: AS395257 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: 199.247.50.0/24 descr: SingularisIT, LLC origin: AS395257 notify: noc [at] singularisit.com mnt-by: MNT-SIL-136 changed: bmcnenly [at] singularisit.com 20190514 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2604:e6c0::/32 descr: SingularisIT, LLC origin: AS395257 notify: noc [at] singularisit.com mnt-by: MNT-SIL-136 changed: bmcnenly [at] singularisit.com 20190515 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source