These entries are queried from radb.net using whois, you can try my project getting these.
:AS18307 route: 103.62.228.0/24 origin: AS18307 descr: SRAIL mnt-by: MAINT-AS4766 changed: ipnoc [at] kt.com 20190111 #05:14:10Z source: RADB last-modified: 2023-11-13T16:15:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.62.229.0/24 origin: AS18307 descr: SRAIL mnt-by: MAINT-AS4766 changed: ipnoc [at] kt.com 20190111 #05:14:47Z source: RADB last-modified: 2023-11-13T16:15:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source