These entries are queried from radb.net using whois, you can try my project getting these.
:AS328644 route: 102.223.251.0/24 origin: AS328644 descr: Enterprise IP Range mnt-by: WSBS1-MNT changed: *** [at] wsb.co.za 20200625 source: AFRINIC rpki-ov-state: valid route6: 2001:43f8:14c0::/48 origin: AS328644 descr: Enterprise IPv6 Range mnt-by: WSBS1-MNT changed: *** [at] wsb.co.za 20200625 source: AFRINIC rpki-ov-state: valid