These entries are queried from radb.net using whois, you can try my project getting these.
:AS394797 route: 136.144.0.0/20 origin: AS394797 descr: ICN Customer - Milikin University mnt-by: MAINT-AS6325 changed: lisa.koltun [at] illinois.gov 20200427 #17:22:04Z source: RADB last-modified: 2023-11-13T16:00:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source