These entries are queried from radb.net using whois, you can try my project getting these.
:AS18771 route: 199.21.104.0/21 origin: AS18771 descr: + MNT-AL-6 route 199.021.104.000/21 AS18771 admin-c: IPADM575-ARIN tech-c: DSCNO-ARIN tech-c: SCARB11-ARIN mnt-by: MNT-AL-6 created: 2023-11-29T03:52:59Z last-modified: 2023-11-29T03:52:59Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.21.104.0/23 origin: AS18771 descr: MNT-AL-6 route 199.021.104.000/23 AS18771 admin-c: IPADM575-ARIN tech-c: DSCNO-ARIN tech-c: SCARB11-ARIN mnt-by: MNT-AL-6 created: 2023-11-29T03:55:32Z last-modified: 2023-11-29T03:55:32Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.21.111.0/24 origin: AS18771 descr: MNT-AL-6 route 199.021.104.000/21 AS18771 admin-c: IPADM575-ARIN tech-c: DSCNO-ARIN tech-c: SCARB11-ARIN mnt-by: MNT-AL-6 created: 2023-11-29T03:56:39Z last-modified: 2023-11-29T03:56:39Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2606:3300::/32 origin: AS18771 descr: MNT-AL-6 route 2606:3300::/32 AS18771 admin-c: IPADM575-ARIN tech-c: DSCNO-ARIN tech-c: SCARB11-ARIN mnt-by: MNT-AL-6 created: 2024-01-25T21:42:59Z last-modified: 2024-01-25T21:42:59Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source