These entries are queried from radb.net using whois, you can try my project getting these.
:AS39836 route: 66.171.231.0/25 descr: Akamai Technologies origin: AS39836 mnt-by: AKAM1-ALTDB-MNT changed: marty [at] akamai.com 20110504 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source