These entries are queried from radb.net using whois, you can try my project getting these.
:AS398456 route: 185.212.6.0/24 origin: AS398456 descr: route for downstream customer Liberty Center mnt-by: MAINT-AS26554 changed: toc [at] ussignal.com 20200825 #15:17:23Z source: RADB last-modified: 2023-11-13T16:01:34Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source