These entries are queried from radb.net using whois, you can try my project getting these.
:AS263622 route6: 2804:1028::/32 descr: PROXY FOR OPENX CUSTOMER origin: AS263622 mnt-by: MAINT-AS263444 notify: registro [at] openx.com.br changed: registro [at] openx.com.br 20200710 remarks: Fri Jul 10 13:59:14 2020 source: RADB last-modified: 2023-11-13T16:01:12Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source