These entries are queried from radb.net using whois, you can try my project getting these.
:AS23455 route6: 2600:1409:3::/48 descr: Akamai Technologies origin: AS23455 mnt-by: AKAM1-ALTDB-MNT changed: ip-admin [at] akamai.com 20120305 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2600:1409:8::/48 descr: Akamai Technologies origin: AS23455 mnt-by: AKAM1-ALTDB-MNT changed: ip-admin [at] akamai.com 20120803 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2600:1409:9::/48 descr: Akamai Technologies origin: AS23455 mnt-by: AKAM1-ALTDB-MNT changed: ip-admin [at] akamai.com 20120821 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source