These entries are queried from radb.net using whois, you can try my project getting these.
:AS62184 route: 103.12.0.0/24 descr: Vultr Customer Route origin: AS62184 notify: network [at] choopa.com mnt-by: MAINT-AS20473 changed: network [at] choopa.com 20221202 #00:36:02-18000 source: RADB last-modified: 2023-11-13T16:13:11Z rpki-ov-state: valid route: 103.12.0.0/24 descr: MNO-NET JAPAN origin: AS62184 mnt-by: MAINT-MNO last-modified: 2022-07-27T07:22:26Z source: APNIC rpki-ov-state: valid route6: 2001:df1:f40::/48 descr: MNO-NET JAPAN origin: AS62184 mnt-by: MAINT-MNO last-modified: 2022-07-27T09:19:25Z source: APNIC rpki-ov-state: valid route6: 2001:df1:f40::/48 descr: Vultr Customer Route origin: AS62184 notify: network [at] choopa.com mnt-by: MAINT-AS20473 changed: network [at] choopa.com 20221210 #00:37:55-18000 source: RADB last-modified: 2023-11-13T16:13:12Z rpki-ov-state: valid