These entries are queried from radb.net using whois, you can try my project getting these.
:AS30648 route: 198.17.96.0/24 descr: ERA origin: AS30648 mnt-by: MNT-ERA-18 changed: bojan [at] era.ca 20171019 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source