These entries are queried from radb.net using whois, you can try my project getting these.
:AS399190 route: 192.68.108.0/24 descr: Frontier Science and Technology origin: AS399190 mnt-by: MAINT-AS27506 changed: yasu.ikehara [at] crowncastle.com 20210107 source: RADB last-modified: 2023-11-13T16:03:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source