These entries are queried from radb.net using whois, you can try my project getting these.
:AS395820 route: 50.226.29.0/24 descr: ISG origin: AS395820 mnt-by: MAINT-AS27506 changed: yikehara [at] lightower.com 20170809 source: RADB last-modified: 2023-11-13T15:51:18Z rpki-ov-state: valid route: 172.83.51.0/24 descr: Integrated Security Group origin: AS395820 mnt-by: MAINT-AS27506 changed: mdimambro [at] lightower.com 20180228 source: RADB last-modified: 2023-11-13T15:53:20Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source