These entries are queried from radb.net using whois, you can try my project getting these.
:AS131903 route: 103.59.89.0/24 descr: Nomura Research Institute origin: AS131903 notify: admin [at] int-gw.kddi.ne.jp mnt-by: MAINT-AS2516 changed: admin [at] int-gw.kddi.ne.jp 20150611 source: RADB last-modified: 2023-11-13T15:47:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source