These entries are queried from radb.net using whois, you can try my project getting these.
:AS45407 route: 14.52.31.0/24 descr: Dongwon origin: AS45407 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20140103 #09:56:19Z source: RADB last-modified: 2023-11-13T16:15:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 58.120.165.0/24 descr: Donwon Enterprise origin: AS45407 mnt-by: MAINT-AS4766 changed: ipnoc [at] kt.com 20150316 #10:24:39Z source: RADB last-modified: 2023-11-13T16:15:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 218.233.5.0/24 descr: Dongwon origin: AS45407 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20140103 #09:57:11Z source: RADB last-modified: 2023-11-13T16:15:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source