These entries are queried from radb.net using whois, you can try my project getting these.
:AS9973 route: 1.16.64.0/22 descr: AS : 9973 origin: AS9973 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20171222 #12:55:35Z source: RADB last-modified: 2023-11-13T15:52:42Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 1.209.211.0/24 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20200623 source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 1.227.61.0/24 origin: AS9973 descr: AS9973 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20190102 #00:44:19Z 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: 61.252.172.0/22 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20240402 source: RADB last-modified: 2024-04-02T05:18:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.106.140.0/22 descr: Sejong origin: AS9973 mnt-by: MAINT-AS4766 changed: ipnoc [at] kt.com 20171227 #04:30:44Z source: RADB last-modified: 2023-11-13T16:15:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 175.118.115.0/24 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20200623 source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 182.50.16.0/20 origin: AS9973 descr: AS9973 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: 182.50.22.0/24 descr: AS9973 origin: AS9973 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20180103 #03:12:51Z source: RADB last-modified: 2023-11-13T15:52:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 182.50.24.0/24 descr: AS9973 origin: AS9973 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20180103 #03:14:03Z source: RADB last-modified: 2023-11-13T15:52:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 182.50.25.0/24 descr: AS9973 origin: AS9973 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20180103 #03:14:27Z source: RADB last-modified: 2023-11-13T15:52:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 182.50.26.0/24 descr: AS9973 origin: AS9973 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20180103 #03:14:46Z source: RADB last-modified: 2023-11-13T15:52:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 182.50.27.0/24 descr: AS9973 origin: AS9973 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20180103 #03:15:03Z source: RADB last-modified: 2023-11-13T15:52:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 182.50.28.0/24 descr: AS9973 origin: AS9973 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20180103 #03:15:26Z source: RADB last-modified: 2023-11-13T15:52:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 182.50.29.0/24 descr: AS9973 origin: AS9973 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20180103 #03:15:50Z source: RADB last-modified: 2023-11-13T15:52:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 202.124.254.0/24 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20240402 source: RADB last-modified: 2024-04-02T05:18:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 202.124.255.0/24 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20240402 source: RADB last-modified: 2024-04-02T05:18:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.227.88.0/22 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20240402 source: RADB last-modified: 2024-04-02T05:18:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.231.136.0/22 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20240402 source: RADB last-modified: 2024-04-02T05:18:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.235.22.0/23 origin: AS9973 descr: AS9973 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: 203.235.128.0/22 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20240402 source: RADB last-modified: 2024-04-02T05:18:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.236.176.0/22 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20240402 source: RADB last-modified: 2024-04-02T05:18:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.238.106.0/24 origin: AS9973 descr: SejongTelecom.co.ltd mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20240402 # 0529Z source: RADB last-modified: 2024-04-02T05:30:00Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.238.107.0/24 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20240402 source: RADB last-modified: 2024-04-02T05:18:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.121.183.0/24 descr: KEB Futures Co. origin: AS9973 mnt-by: MAINT-AS4766 changed: jyoungk [at] streamwk.kix.net 20000605 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: 211.45.218.0/24 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20200623 source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 211.45.222.0/24 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20200623 source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 211.45.228.0/24 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20200623 source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 211.45.230.0/24 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20200623 source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 211.110.95.0/24 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20200623 source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 211.181.232.0/24 descr: SejongTelecom.co.ltd origin: AS9973 mnt-by: MAINT-AS4670 changed: network [at] sejongtelecom.net 20200623 source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source