These entries are queried from radb.net using whois, you can try my project getting these.
:AS21651 route: 12.145.188.0/24 origin: AS21651 admin-c: NETWO9089-ARIN tech-c: NETWO9089-ARIN mnt-by: MNT-TFL-19 created: 2021-01-19T20:32:58Z last-modified: 2021-01-19T20:32:58Z source: ARIN descr: MNT-TFL-19 route 012.145.188.000/24 AS21651 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 64.211.58.0/24 origin: AS21651 admin-c: NETWO9089-ARIN tech-c: NETWO9089-ARIN mnt-by: MNT-TFL-19 created: 2021-01-14T20:22:20Z last-modified: 2021-01-14T20:22:20Z source: ARIN descr: MNT-TFL-19 route 064.211.058.000/24 AS21651 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 64.214.85.0/24 origin: AS21651 admin-c: NETWO9089-ARIN tech-c: NETWO9089-ARIN mnt-by: MNT-TFL-19 created: 2021-01-14T22:16:24Z last-modified: 2021-01-14T22:16:24Z source: ARIN descr: MNT-TFL-19 route 064.214.085.000/24 AS21651 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.21.132.0/24 origin: AS21651 admin-c: NETWO9089-ARIN tech-c: NETWO9089-ARIN mnt-by: MNT-TFL-19 created: 2020-12-08T16:45:45Z last-modified: 2020-12-08T16:45:45Z source: ARIN descr: MNT-TFL-19 route 199.021.132.000/24 AS21651 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.21.133.0/24 origin: AS21651 admin-c: NETWO9089-ARIN tech-c: NETWO9089-ARIN mnt-by: MNT-TFL-19 created: 2020-12-08T16:46:36Z last-modified: 2020-12-08T16:46:36Z source: ARIN descr: MNT-TFL-19 route 199.021.133.000/24 AS21651 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.21.134.0/24 origin: AS21651 admin-c: NETWO9089-ARIN tech-c: NETWO9089-ARIN mnt-by: MNT-TFL-19 created: 2020-12-08T16:47:14Z last-modified: 2020-12-08T16:47:14Z source: ARIN descr: MNT-TFL-19 route 199.021.134.000/24 AS21651 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.21.135.0/24 origin: AS21651 admin-c: NETWO9089-ARIN tech-c: NETWO9089-ARIN mnt-by: MNT-TFL-19 created: 2020-12-08T16:47:35Z last-modified: 2020-12-08T16:47:35Z source: ARIN descr: MNT-TFL-19 route 199.021.135.000/24 AS21651 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source