These entries are queried from radb.net using whois, you can try my project getting these.
:AS18031 route: 61.72.126.0/23 descr: contact noc [at] bora.net if necessary origin: AS18031 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20030121 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: 61.72.128.0/23 descr: contact noc [at] bora.net if necessary origin: AS18031 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20030121 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: 117.16.40.0/21 descr: Sangmyoung Univ. origin: AS18031 mnt-by: MAINT-AS4766 changed: datakit [at] kornet.net 20070821 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: 117.16.48.0/24 descr: AS 18031 origin: AS18031 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20171227 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: 117.16.108.0/24 descr: AS 18031 origin: AS18031 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20171227 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: 117.16.109.0/24 descr: AS 18031 origin: AS18031 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20171227 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: 117.16.110.0/24 descr: AS 18031 origin: AS18031 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20171227 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: 117.16.111.0/24 descr: AS 18031 origin: AS18031 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20171227 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: 117.16.122.0/23 descr: AS 18031 origin: AS18031 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20171227 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: 203.237.168.0/21 descr: contact noc [at] bora.net if necessary origin: AS18031 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20030121 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: 203.237.168.0/24 descr: AS 18031 origin: AS18031 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20171227 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: 203.237.169.0/24 descr: AS 18031 origin: AS18031 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20171227 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: 203.237.170.0/24 descr: AS 18031 origin: AS18031 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20171227 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: 203.237.171.0/24 descr: AS 18031 origin: AS18031 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20171227 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: 203.237.172.0/24 descr: as-name SANGMYUNG-AS-KR origin: AS18031 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20170215 #13:15:38Z 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: 203.237.173.0/24 descr: AS 18031 origin: AS18031 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20171227 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: 203.237.174.0/24 descr: AS 18031 origin: AS18031 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20171227 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: 203.237.175.0/24 descr: SANGMYUNG-AS-KR origin: AS18031 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: 220.149.24.0/21 descr: contact noc [at] bora.net if necessary origin: AS18031 mnt-by: MAINT-AS3786 changed: yuncheol [at] bora.net 20040726 source: RADB last-modified: 2023-11-13T16:09:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source