These entries are queried from radb.net using whois, you can try my project getting these.
:AS328352 route: 102.135.189.0/24 descr: UNECA/SRO-CA network origin: AS328352 mnt-by: UNEC1-MNT changed: *** [at] un.org 20181102 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source