These entries are queried from radb.net using whois, you can try my project getting these.
:AS263401 route6: 2804:15a8::/32 descr: Solicitado por nuestro cliente VEGAS TELECOM para LSOFT. Abril 3 2014. origin: AS263401 mnt-by: MAINT-AS18678 changed: adminred [at] internexa.com 20140403 #14:18:31Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source