These entries are queried from radb.net using whois, you can try my project getting these.
:AS55599 route: 103.90.209.0/24 descr: namyang origin: AS55599 mnt-by: MAINT-AS4766 changed: ipnoc [at] kt.com 20170619 #01:34:12Z 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: 211.42.184.0/24 descr: namyang origin: AS55599 mnt-by: MAINT-AS4766 changed: ipnoc [at] kt.com 20170619 #01:34:48Z 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: 211.50.107.0/24 descr: namyang origin: AS55599 mnt-by: MAINT-AS4766 changed: ipnoc [at] kt.com 20170619 #01:35:13Z source: RADB last-modified: 2023-11-13T16:15:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source