These entries are queried from radb.net using whois, you can try my project getting these.
:AS16427 route: 204.13.231.0/24 descr: Mirae Asset Securities (USA) Inc descr: 810 Seventh Ave Suite 3700 descr: New York, New York 10019 descr: US origin: AS16427 mnt-by: MNT-MASU-3 changed: brian.mcmanus [at] miraeasset.us.com 20200124 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source