These entries are queried from radb.net using whois, you can try my project getting these.
:AS328158 route: 204.8.206.0/24 descr: Route Object origin: AS328158 mnt-by: EXCHANGE-MNT changed: *** [at] exchangetelecom.com.ng 20170522 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source