These entries are queried from radb.net using whois, you can try my project getting these.
:AS16868 route: 198.190.156.0/23 descr: Praxair origin: AS16868 mnt-by: MAINT-AS27506 changed: rhinst [at] lightower.com 20160902 #18:57:08Z source: RADB last-modified: 2023-11-13T15:49:51Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source