These entries are queried from radb.net using whois, you can try my project getting these.
:AS328374 route: 196.50.3.0/24 descr: Route Object origin: AS328374 mnt-by: TSGL1-MNT changed: *** [at] spar.co.za 20181108 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:43f8:c90::/48 descr: Route Object origin: AS328374 mnt-by: TSGL1-MNT changed: *** [at] spar.co.za 20181108 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source