These entries are queried from radb.net using whois, you can try my project getting these.
:AS23582 route: 103.253.241.0/24 origin: AS23582 descr: AS23582 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20190102 #04:36:55Z source: RADB last-modified: 2023-11-13T15:55:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.253.243.0/24 origin: AS23582 descr: AS23582 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20190102 #04:36:55Z source: RADB last-modified: 2023-11-13T15:55:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 116.120.61.0/24 descr: proxy for HANARO TELECOM route origin: AS23582 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: 116.120.62.0/23 descr: proxy for HANARO TELECOM route origin: AS23582 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: 116.127.60.0/23 descr: proxy for HANARO TELECOM route origin: AS23582 mnt-by: MAINT-HANARO changed: ce-support [at] us.ntt.net 20081125 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 121.168.251.0/24 descr: Doosan origin: AS23582 mnt-by: MAINT-AS4766 changed: chinny7904 [at] kornet.net 20080121 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: 121.168.252.0/22 descr: Doosan origin: AS23582 mnt-by: MAINT-AS4766 changed: chinny7904 [at] kornet.net 20080121 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: 203.226.130.0/24 descr: Doosan Information Communication BU origin: AS23582 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20170215 #17:00:31Z source: RADB last-modified: 2023-11-13T15:50:50Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.226.136.0/24 descr: proxy for HANARO TELECOM route origin: AS23582 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: 203.226.137.0/24 descr: proxy for HANARO TELECOM route origin: AS23582 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: 203.226.138.0/23 descr: proxy for HANARO TELECOM route origin: AS23582 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: 203.226.140.0/22 descr: proxy for HANARO TELECOM route origin: AS23582 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: 203.226.142.0/24 descr: DOOSAN-AS-KR origin: AS23582 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20201018 #12:43:18Z source: RADB last-modified: 2023-11-13T16:02:39Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.226.151.0/24 descr: proxy for HANARO TELECOM route origin: AS23582 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: 203.226.154.0/24 descr: proxy for HANARO TELECOM route origin: AS23582 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: 203.226.167.0/24 descr: proxy for HANARO TELECOM route origin: AS23582 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: 203.226.173.0/24 descr: proxy for HANARO TELECOM route origin: AS23582 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: 203.226.177.0/24 descr: proxy for HANARO TELECOM route origin: AS23582 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: 203.226.181.0/24 origin: AS23582 descr: DOOSAN-AS-KR mnt-by: MAINT-AS9318 changed: ipnoc [at] skbroadband.com 20220424 source: RADB last-modified: 2023-11-13T16:10:52Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.226.182.0/24 origin: AS23582 descr: DOOSAN-AS-KR mnt-by: MAINT-AS9318 changed: ipnoc [at] skbroadband.com 20220424 source: RADB last-modified: 2023-11-13T16:10:52Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.206.204.0/24 descr: AS23582 origin: AS23582 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20210317 #12:59:28Z source: RADB last-modified: 2023-11-13T16:05:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source