These entries are queried from radb.net using whois, you can try my project getting these.
:AS38667 route: 61.252.176.0/24 origin: AS38667 descr: kakaobank(AS38667) mnt-by: MAINT-AS9318 changed: ipnoc [at] skbroadband.com 20230529 #01:19:32Z source: RADB last-modified: 2023-11-13T16:17:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 61.252.178.0/24 descr: SejongTelecom.co.ltd origin: AS38667 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20231210 source: RADB last-modified: 2023-12-10T00:52:47Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.66.192.0/22 descr: kakao origin: AS38667 mnt-by: MAINT-AS4766 changed: ipnoc [at] kt.com 20160622 #09:27:16Z 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: 103.254.248.0/24 descr: KAKAO origin: AS38667 mnt-by: MAINT-AS4766 changed: ipnoc [at] kt.com 20160721 #01:38:30Z 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: 103.254.249.0/24 descr: KAKAO origin: AS38667 mnt-by: MAINT-AS4766 changed: ipnoc [at] kt.com 20160721 #01:39:36Z 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: 211.202.80.0/24 descr: proxy for HANARO TELECOM route origin: AS38667 mnt-by: MAINT-HANARO changed: ce-support [at] us.ntt.net 20080504 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 211.202.80.0/24 descr: Proxy-registered route object origin: AS38667 notify: radb [at] hutchcity.com mnt-by: MAINT-AS9304 changed: radb [at] hutchcity.com 20071025 source: RADB last-modified: 2023-11-13T15:40:36Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source