These entries are queried from radb.net using whois, you can try my project getting these.
:AS18276 route: 158.217.0.0/16 descr: Kansai University origin: AS18276 mnt-by: MAINT-AS2907 changed: as2907 [at] sinet.ad.jp 20230712 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 158.217.0.0/16 origin: AS18276 descr: KAISER Kansai University Information Technology Center admin-c: Masanori Kakimoto admin-c: Tsuyoshi Kawabe tech-c: Masanori Kakimoto tech-c: Tsuyoshi Kawabe notify: kakimoto [at] jm.kansai-u.ac.jp notify: kawabe [at] jm.kansai-u.ac.jp mnt-by: MAINT-AS18276 changed: kawabe [at] jm.kansai-u.ac.jp 20220328 #02:59:35Z source: RADB last-modified: 2023-11-13T16:10:14Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 158.217.0.0/24 origin: AS18276 descr: KAISER Kansai University Information Technology Center admin-c: Masanori Kakimoto admin-c: Tsuyoshi Kawabe tech-c: Masanori Kakimoto tech-c: Tsuyoshi Kawabe notify: kakimoto [at] jm.kansai-u.ac.jp notify: kawabe [at] jm.kansai-u.ac.jp mnt-by: MAINT-AS18276 changed: kawabe [at] jm.kansai-u.ac.jp 20220328 #03:10:59Z source: RADB last-modified: 2023-11-13T16:10:14Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 158.217.2.0/23 origin: AS18276 descr: KAISER Kansai University Information Technology Center admin-c: Masanori Kakimoto admin-c: Tsuyoshi Kawabe tech-c: Masanori Kakimoto tech-c: Tsuyoshi Kawabe notify: kakimoto [at] jm.kansai-u.ac.jp notify: kawabe [at] jm.kansai-u.ac.jp mnt-by: MAINT-AS18276 changed: kawabe [at] jm.kansai-u.ac.jp 20220328 #03:06:43Z source: RADB last-modified: 2023-11-13T16:10:14Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 158.217.4.0/22 origin: AS18276 descr: KAISER Kansai University Information Technology Center admin-c: Masanori Kakimoto admin-c: Tsuyoshi Kawabe tech-c: Masanori Kakimoto tech-c: Tsuyoshi Kawabe notify: kakimoto [at] jm.kansai-u.ac.jp notify: kawabe [at] jm.kansai-u.ac.jp mnt-by: MAINT-AS18276 changed: kawabe [at] jm.kansai-u.ac.jp 20220328 #03:04:06Z source: RADB last-modified: 2023-11-13T16:10:14Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 158.217.8.0/21 origin: AS18276 descr: KAISER Kansai University Information Technology Center admin-c: Masanori Kakimoto admin-c: Tsuyoshi Kawabe tech-c: Masanori Kakimoto tech-c: Tsuyoshi Kawabe notify: kakimoto [at] jm.kansai-u.ac.jp notify: kawabe [at] jm.kansai-u.ac.jp mnt-by: MAINT-AS18276 changed: kawabe [at] jm.kansai-u.ac.jp 20220328 #03:01:51Z source: RADB last-modified: 2023-11-13T16:10:14Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 158.217.16.0/20 origin: AS18276 descr: KAISER Kansai University Information Technology Center admin-c: Masanori Kakimoto admin-c: Tsuyoshi Kawabe tech-c: Masanori Kakimoto tech-c: Tsuyoshi Kawabe notify: kakimoto [at] jm.kansai-u.ac.jp notify: kawabe [at] jm.kansai-u.ac.jp mnt-by: MAINT-AS18276 changed: kawabe [at] jm.kansai-u.ac.jp 20220328 #03:08:21Z source: RADB last-modified: 2023-11-13T16:10:14Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 158.217.32.0/19 origin: AS18276 descr: KAISER Kansai University Information Technology Center admin-c: Masanori Kakimoto admin-c: Tsuyoshi Kawabe tech-c: Masanori Kakimoto tech-c: Tsuyoshi Kawabe notify: kakimoto [at] jm.kansai-u.ac.jp notify: kawabe [at] jm.kansai-u.ac.jp mnt-by: MAINT-AS18276 changed: kawabe [at] jm.kansai-u.ac.jp 20220328 #03:05:47Z source: RADB last-modified: 2023-11-13T16:10:14Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 158.217.64.0/18 origin: AS18276 descr: KAISER Kansai University Information Technology Center admin-c: Masanori Kakimoto admin-c: Tsuyoshi Kawabe tech-c: Masanori Kakimoto tech-c: Tsuyoshi Kawabe notify: kakimoto [at] jm.kansai-u.ac.jp notify: kawabe [at] jm.kansai-u.ac.jp mnt-by: MAINT-AS18276 changed: kawabe [at] jm.kansai-u.ac.jp 20220328 #03:03:16Z source: RADB last-modified: 2023-11-13T16:10:14Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 158.217.128.0/17 origin: AS18276 descr: KAISER Kansai University Information Technology Center admin-c: Masanori Kakimoto admin-c: Tsuyoshi Kawabe tech-c: Masanori Kakimoto tech-c: Tsuyoshi Kawabe notify: kakimoto [at] jm.kansai-u.ac.jp notify: kawabe [at] jm.kansai-u.ac.jp mnt-by: MAINT-AS18276 changed: kawabe [at] jm.kansai-u.ac.jp 20220328 #03:09:44Z source: RADB last-modified: 2023-11-13T16:10:14Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source