These entries are queried from radb.net using whois, you can try my project getting these.
:AS37891 route: 58.147.160.0/21 descr: JTIS origin: AS37891 notify: support [at] jtis.co.jp mnt-by: MAINT-JTIS-AS37891 changed: kpack [at] gin.ntt.net 20220112 source: NTTCOM last-modified: 2022-01-12T18:43:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 58.147.162.0/24 descr: JTIS origin: AS37891 notify: support [at] jtis.co.jp mnt-by: MAINT-JTIS-AS37891 changed: support [at] jtis.co.jp 20220113 source: NTTCOM last-modified: 2022-01-13T00:09:53Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 58.147.163.0/24 descr: JTIS origin: AS37891 notify: support [at] jtis.co.jp mnt-by: MAINT-JTIS-AS37891 changed: support [at] jtis.co.jp 20220113 source: NTTCOM last-modified: 2022-01-13T00:09:53Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 58.147.165.0/24 descr: JTIS origin: AS37891 notify: support [at] jtis.co.jp mnt-by: MAINT-JTIS-AS37891 changed: support [at] jtis.co.jp 20220113 source: NTTCOM last-modified: 2022-01-13T00:09:53Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 58.147.166.0/24 descr: JTIS origin: AS37891 notify: support [at] jtis.co.jp mnt-by: MAINT-JTIS-AS37891 changed: support [at] jtis.co.jp 20220113 source: NTTCOM last-modified: 2022-01-13T00:09:53Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 58.147.167.0/24 descr: JTIS origin: AS37891 notify: support [at] jtis.co.jp mnt-by: MAINT-JTIS-AS37891 changed: support [at] jtis.co.jp 20220113 source: NTTCOM last-modified: 2022-01-13T00:09:53Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.218.65.0/24 descr: JTIS origin: AS37891 notify: support [at] jtis.co.jp mnt-by: MAINT-JTIS-AS37891 changed: kpack [at] gin.ntt.net 20220112 source: NTTCOM last-modified: 2022-01-12T18:43:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.218.66.0/24 descr: JTIS origin: AS37891 notify: support [at] jtis.co.jp mnt-by: MAINT-JTIS-AS37891 changed: kpack [at] gin.ntt.net 20220112 source: NTTCOM last-modified: 2022-01-12T18:43:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source