These entries are queried from radb.net using whois, you can try my project getting these.
:AS16840 route: 206.183.153.0/24 descr: Vultr Customer Route origin: AS16840 notify: network [at] constant.com mnt-by: MAINT-AS20473 changed: network [at] constant.com 20240416 #12:35:31-14400 source: RADB last-modified: 2024-04-16T16:40:17Z rpki-ov-state: valid route6: 2607:9b40::/32 descr: Vultr Customer Route origin: AS16840 notify: network [at] constant.com mnt-by: MAINT-AS20473 changed: network [at] constant.com 20240307 #11:32:22-18000 source: RADB last-modified: 2024-03-07T16:32:26Z rpki-ov-state: valid