These entries are queried from radb.net using whois, you can try my project getting these.
:AS30392 route: 67.208.171.0/24 descr: Advisory Board Company, The origin: AS30392 mnt-by: MAINT-AS27506 changed: rmaddula [at] lightower.com 20160609 source: RADB last-modified: 2023-11-13T15:49:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source