These entries are queried from radb.net using whois, you can try my project getting these.
:AS38686 route: 58.227.54.0/26 origin: AS38686 descr: SejongTelecom.co.ltd mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20231219 # 0420Z source: RADB last-modified: 2023-12-19T04:20:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 61.34.216.0/24 descr: AS38686 customer's prefix origin: AS38686 mnt-by: MAINT-AS9318 changed: empires [at] sk.com 20141016 #09:08:09Z source: RADB last-modified: 2023-11-13T15:46:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 61.34.216.0/27 descr: LG-cns origin: AS38686 mnt-by: MAINT-AS4766 changed: sooh52 [at] kornet.net 20080314 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: 115.92.212.0/25 descr: SejongTelecom.co.ltd origin: AS38686 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20181024 #05:46:35Z source: RADB last-modified: 2023-11-13T15:54:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.228.198.0/24 descr: AS38686 origin: AS38686 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20151112 #01:27:00Z source: RADB last-modified: 2023-11-13T15:48:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.228.198.0/29 descr: SejongTelecom.co.ltd origin: AS38686 notify: network [at] sejongtelecom.net mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20171229 #05:09:13Z source: RADB last-modified: 2023-11-13T15:52:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.235.15.0/24 descr: SejongTelecom.co.ltd origin: AS38686 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20180926 #00:56:25Z source: RADB last-modified: 2023-11-13T15:54:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.239.24.0/24 origin: AS38686 descr: SejongTelecom.co.ltd mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20231219 # 0419Z source: RADB last-modified: 2023-12-19T04:19:22Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.239.25.0/24 origin: AS38686 descr: SejongTelecom.co.ltd mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20181224 #09:06:01Z source: RADB last-modified: 2023-11-13T15:55:22Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.207.32.0/24 descr: SejongTelecom.co.ltd origin: AS38686 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20240102 source: RADB last-modified: 2024-01-02T04:26:39Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.216.95.0/24 descr: LG-cns origin: AS38686 mnt-by: MAINT-AS4766 changed: sooh52 [at] kornet.net 20080314 source: RADB last-modified: 2023-11-13T16:15:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source