These entries are queried from radb.net using whois, you can try my project getting these.
:AS18124 route: 150.55.0.0/16 descr: Okayama University of Science origin: AS18124 notify: netadmin [at] center.ous.ac.jp mnt-by: MAINT-AS18124 changed: masuzawa [at] ntt.ocn.ne.jp 20020429 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 150.55.0.0/16 descr: Okayama University of Science origin: AS18124 mnt-by: MAINT-AS2907 changed: as2907 [at] sinet.ad.jp 20231201 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 150.55.0.0/17 descr: Okayama University of Science origin: AS18124 mnt-by: MAINT-AS2907 changed: as2907 [at] sinet.ad.jp 20240401 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 150.55.0.0/18 descr: Okayama University of Science origin: AS18124 mnt-by: MAINT-AS2907 changed: as2907 [at] sinet.ad.jp 20240401 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 150.55.64.0/18 descr: Okayama University of Science origin: AS18124 mnt-by: MAINT-AS2907 changed: as2907 [at] sinet.ad.jp 20240401 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 150.55.128.0/18 descr: Okayama University of Science origin: AS18124 mnt-by: MAINT-AS2907 changed: as2907 [at] sinet.ad.jp 20240401 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 150.55.128.0/21 descr: Okayama University of Science origin: AS18124 mnt-by: MAINT-AS2907 changed: as2907 [at] sinet.ad.jp 20240401 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 150.55.128.0/22 descr: Okayama University of Science origin: AS18124 mnt-by: MAINT-AS2907 changed: as2907 [at] sinet.ad.jp 20240401 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 150.55.132.0/22 descr: Okayama University of Science origin: AS18124 mnt-by: MAINT-AS2907 changed: as2907 [at] sinet.ad.jp 20240401 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 150.55.192.0/18 descr: Okayama University of Science X-Keiro:iic [at] ous.ac.jp origin: AS18124 notify: iic [at] ous.ac.jp mnt-by: MAINT-AS18124 changed: a-saito [at] ous.ac.jp 20240401 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:df0:3d80::/48 descr: Okayama University of Science origin: AS18124 mnt-by: MAINT-AS7670 changed: ry-naito [at] enecom.co.jp 20240201 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:df0:3d80::/48 origin: AS18124 descr: Okayama University of Science mnt-by: MAINT-AS7670 changed: cccn-adm [at] ctnet.ad.jp 20190530 #00:45:05Z source: RADB last-modified: 2023-11-13T15:56:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source