These entries are queried from radb.net using whois, you can try my project getting these.
:AS23993 route: 202.38.163.0/24 descr: Omninetworks origin: AS23993 mnt-by: MAINT-WA-OMNINET last-modified: 2018-06-14T07:23:27Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source