These entries are queried from radb.net using whois, you can try my project getting these.
:AS131475 route: 103.31.24.0/23 origin: AS131475 descr: Singapore Institute of Technology 10 Dover Drive mnt-by: MAINT-SIT-SG last-modified: 2020-07-13T01:50:54Z source: APNIC rpki-ov-state: valid route: 103.31.24.0/24 origin: AS131475 descr: Singapore Institute of Technology 10 Dover Drive mnt-by: MAINT-SIT-SG last-modified: 2020-07-13T01:50:55Z source: APNIC rpki-ov-state: valid route: 103.31.25.0/24 origin: AS131475 descr: Singapore Institute of Technology 10 Dover Drive mnt-by: MAINT-SIT-SG last-modified: 2020-07-13T01:50:55Z source: APNIC rpki-ov-state: valid route6: 2001:df0:425::/48 origin: AS131475 descr: Singapore Institute of Technology 10 Dover Drive mnt-by: MAINT-SIT-SG last-modified: 2020-07-13T01:50:54Z source: APNIC rpki-ov-state: valid