These entries are queried from radb.net using whois, you can try my project getting these.
:AS398234 route: 12.15.49.0/24 descr: HUSCO INTERNATIONAL, INC. descr: 2239 Pewaukee Rd descr: Waukesha, WI, 53188 descr: US origin: AS398234 mnt-by: MNT-HIT-82 changed: it.iementor [at] huscointl.com 20200214 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source