These entries are queried from radb.net using whois, you can try my project getting these.
:AS17600 route: 61.108.48.0/24 descr: KOREA RESOURCES RECOVERY AND REUTILIZATION CORPORATION origin: AS17600 mnt-by: MAINT-AS4766 changed: ipnoc [at] kt.com 20181129 #05:51:47Z 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: 61.108.90.0/24 descr: Korea Environment & Resources Corporation origin: AS17600 mnt-by: MAINT-AS4766 changed: chss93 [at] kornet.net 20050308 #00:48:22(UTC) source: RADB last-modified: 2023-11-13T16:15:42Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.104.107.0/25 descr: Korea Environment & Resource Corporation origin: AS17600 mnt-by: MAINT-AS4766 changed: chss93 [at] kornet.net 20050308 #00:50:12(UTC) source: RADB last-modified: 2023-11-13T16:15:42Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.206.200.0/24 origin: AS17600 descr: AS17600 mnt-by: MAINT-AS9318 changed: noc [at] skbroadband.com 20190103 #08:41:57Z source: RADB last-modified: 2023-11-13T15:55:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source