These entries are queried from radb.net using whois, you can try my project getting these.
:AS55628 route: 121.171.233.0/24 origin: AS55628 descr: incheon global campus mnt-by: MAINT-AS4766 changed: ipnoc [at] kt.com 20191021 #04:52:50Z 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: 223.194.196.0/22 descr: Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.196.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.197.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.198.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.199.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.200.0/21 descr: Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.200.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.201.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.202.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.203.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.204.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.205.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.206.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.207.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.208.0/20 descr: Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.208.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.209.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.210.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.211.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.212.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.213.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.214.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.215.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.216.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.217.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.218.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.219.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.220.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.221.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.222.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.223.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.224.0/22 descr: Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.224.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.225.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.226.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 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: 223.194.227.0/24 descr: Incheon Songdo Global University Campus origin: AS55628 mnt-by: MAINT-AS4766 changed: nw [at] kornet.net 20120210 source: RADB last-modified: 2023-11-13T16:15:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source