These entries are queried from radb.net using whois, you can try my project getting these.
:AS46123 route: 204.8.183.0/24 origin: AS46123 descr: Proxy route object registered by Flexential for customer mnt-by: MAINT-FLEXENTIAL changed: DL-BB-Engineering [at] flexential.com 20220712 #18:19:05Z source: RADB last-modified: 2023-11-13T16:11:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source