These entries are queried from radb.net using whois, you can try my project getting these.
:AS52572 route6: 2804:ce0::/32 descr: Easy Call SCM do Brasil LTDA origin: AS52572 notify: redes [at] pinpoint.com.br mnt-by: MAINT-AS52871 changed: amascarenhas [at] pinpoint.com.br 20180126 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source