These entries are queried from radb.net using whois, you can try my project getting these.
:AS139973 route: 103.147.245.0/24 descr: Route object for 103.147.245.0/24 origin: AS139973 mnt-by: MNT-APJII-ID mnt-routes: MAINT-ID-MENIM last-modified: 2024-01-25T09:39:05Z source: IDNIC rpki-ov-state: valid route: 103.147.245.0/24 descr: Route object for 103.147.245.0/24 origin: AS139973 mnt-by: MNT-APJII-ID mnt-routes: MAINT-ID-MENIM last-modified: 2020-08-12T04:02:56Z source: APNIC rpki-ov-state: valid