These entries are queried from radb.net using whois, you can try my project getting these.
:AS136668 route: 103.157.52.0/23 descr: Iana Solutions Digital India origin: AS136668 mnt-routes: MAINT-IN-IANA mnt-by: MAINT-IN-IANA last-modified: 2020-12-01T07:52:46Z source: APNIC rpki-ov-state: valid route: 103.157.52.0/24 descr: Iana Solutions Digital India origin: AS136668 mnt-routes: MAINT-IN-IANA mnt-by: MAINT-IN-IANA last-modified: 2020-12-01T07:52:51Z source: APNIC rpki-ov-state: valid route: 103.157.53.0/24 descr: Iana Solutions Digital India origin: AS136668 mnt-routes: MAINT-IN-IANA mnt-by: MAINT-IN-IANA last-modified: 2020-12-01T07:52:57Z source: APNIC rpki-ov-state: valid