These entries are queried from radb.net using whois, you can try my project getting these.
:AS33612 route6: 2620:26:8000::/48 descr: Tumblr, Inc. origin: AS33612 mnt-by: MAINT-AS33612 changed: peterson [at] tumblr.com 20111117 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source