These entries are queried from radb.net using whois, you can try my project getting these.
:AS147295 route: 203.170.90.0/23 descr: Metro Engines Inc. origin: AS147295 mnt-by: MAINT-METROENGINESINC-JP last-modified: 2024-04-06T03:30:24Z source: APNIC rpki-ov-state: valid route: 203.170.90.0/24 descr: Metro Engines Inc. origin: AS147295 mnt-by: MAINT-METROENGINESINC-JP last-modified: 2024-04-06T03:30:24Z source: APNIC rpki-ov-state: valid route: 203.170.90.0/24 origin: AS147295 descr: Amazon EC2 Prefix mnt-by: MAINT-AS16509 source: radb changed: noc [at] amazon.com 20240406 #04:17:57 last-modified: 2024-04-06T04:17:58Z rpki-ov-state: valid route: 203.170.91.0/24 descr: Metro Engines Inc. origin: AS147295 mnt-by: MAINT-METROENGINESINC-JP last-modified: 2024-04-06T03:30:25Z source: APNIC rpki-ov-state: valid route6: 2001:df3:a2c0::/48 descr: Metro Engines Inc. origin: AS147295 mnt-by: MAINT-METROENGINESINC-JP last-modified: 2024-04-05T04:09:27Z source: APNIC rpki-ov-state: valid