These entries are queried from radb.net using whois, you can try my project getting these.
:AS26268 route: 8.21.228.0/24 descr: Vienna Route origin: AS26268 mnt-by: MAINT-AS26268 changed: michael.maddux [at] level3.com 20100203 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source