These entries are queried from radb.net using whois, you can try my project getting these.
:AS17603 route: 202.31.126.0/23 descr: contact noc [at] bora.net if necessary origin: AS17603 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20021230 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: 202.31.128.0/20 descr: Kum oh National University of Technology origin: AS17603 mnt-by: MAINT-AS4766 changed: kscho [at] streamwk.kix.net 20010710 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: 202.31.192.0/20 descr: Kum oh National University of Technology origin: AS17603 mnt-by: MAINT-AS4766 changed: kscho [at] streamwk.kix.net 20010710 source: RADB last-modified: 2023-11-13T16:15:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source