These entries are queried from radb.net using whois, you can try my project getting these.
:AS9531 route: 210.205.96.0/19 descr: contact ljw29 [at] laim.net if necessary origin: AS9531 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20011223 source: RADB last-modified: 2023-11-13T16:09:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.217.224.0/19 descr: Gwangju City office of education origin: AS9531 mnt-by: MAINT-AS4766 changed: chss93 [at] kornet.net 20040822 source: RADB last-modified: 2023-11-13T16:15:42Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.218.0.0/18 descr: KT Pubnet origin: AS9531 mnt-by: MAINT-AS4766 changed: chss93 [at] kornet.net 20040818 source: RADB last-modified: 2023-11-13T16:15:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.218.64.0/19 descr: Gwangju City office of education origin: AS9531 mnt-by: MAINT-AS4766 changed: chss93 [at] kornet.net 20040819 source: RADB last-modified: 2023-11-13T16:15:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 211.253.68.0/22 descr: Gwangju City office of education origin: AS9531 mnt-by: MAINT-AS4766 changed: driftey [at] kornet.net 20040827 source: RADB last-modified: 2023-11-13T16:15:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 211.253.72.0/21 descr: origin: AS9531 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20041223 source: RADB last-modified: 2023-11-13T16:09:31Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source