These entries are queried from radb.net using whois, you can try my project getting these.
:AS399689 route: 172.98.20.0/24 descr: Anchnet Asia Limited origin: AS399689 mnt-by: MAINT-AS58879 changed: hanph [at] 51idc.com 20230906 source: RADB last-modified: 2023-11-13T16:18:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source