These entries are queried from radb.net using whois, you can try my project getting these.
:AS28303 route: 177.39.0.0/22 descr: Libera=E7=E3o remarks: Proxy registered by Highwinds Network Group origin: AS28303 mnt-by: MNT-HWNG changed: neil.davidson [at] highwinds.com 20121009 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source