These entries are queried from radb.net using whois, you can try my project getting these.
:AS17645 route: 58.65.0.0/19 descr: NTT SINGAPORE - IP NETWORK (AS17645) origin: AS17645 mnt-by: MAINT-AS17645 notify: ip-eng [at] ntt.com.sg changed: ip-eng [at] ntt.com.sg 20061205 source: NTTCOM rpki-ov-state: valid route: 58.65.12.0/22 origin: AS17645 descr: NTT Singapore Pte Ltd 20 WEST PASIR PANJANG ROAD, #11-28 MAPLE TREE BUSINESS CITY mnt-by: MAINT-SG-NTTS last-modified: 2021-01-13T08:02:59Z source: APNIC rpki-ov-state: valid route: 58.65.16.0/22 origin: AS17645 descr: NTT Singapore Pte Ltd 20 WEST PASIR PANJANG ROAD, #11-28 MAPLE TREE BUSINESS CITY mnt-by: MAINT-SG-NTTS last-modified: 2021-01-13T08:07:02Z source: APNIC rpki-ov-state: valid route: 58.65.20.0/22 origin: AS17645 descr: NTT Singapore Pte Ltd 20 WEST PASIR PANJANG ROAD, #11-28 MAPLE TREE BUSINESS CITY mnt-by: MAINT-SG-NTTS last-modified: 2019-06-11T08:22:21Z source: APNIC rpki-ov-state: valid route: 58.65.24.0/23 origin: AS17645 descr: NTT Singapore Pte Ltd 20 WEST PASIR PANJANG ROAD, #11-28 MAPLE TREE BUSINESS CITY mnt-by: MAINT-SG-NTTS last-modified: 2021-01-13T08:09:52Z source: APNIC rpki-ov-state: valid route: 58.65.26.0/23 origin: AS17645 descr: NTT Singapore Pte Ltd 20 WEST PASIR PANJANG ROAD, #11-28 MAPLE TREE BUSINESS CITY mnt-by: MAINT-SG-NTTS last-modified: 2019-06-11T08:22:43Z source: APNIC rpki-ov-state: valid route: 116.51.0.0/16 descr: NTT SINGAPORE - IP NETWORK (AS17645) origin: AS17645 mnt-by: MAINT-AS17645 notify: ip-eng [at] ntt.com.sg changed: ip-eng [at] ntt.com.sg 20070323 source: NTTCOM rpki-ov-state: valid route: 116.51.4.0/24 origin: AS17645 descr: NTT Singapore Pte Ltd 20 WEST PASIR PANJANG ROAD, #11-28 MAPLE TREE BUSINESS CITY mnt-by: MAINT-SG-NTTS last-modified: 2021-01-13T08:24:42Z source: APNIC rpki-ov-state: valid route: 116.51.4.0/24 descr: NTT SINGAPORE - PUBLIC IP NETWORK (AS17645) origin: AS17645 mnt-by: MAINT-AS17645 notify: raymondh [at] ntt.com.sg notify: ip-eng [at] ntt.com.sg changed: ip-eng [at] ntt.com.sg 20070323 source: NTTCOM rpki-ov-state: valid route: 116.51.8.0/23 origin: AS17645 descr: NTT Singapore Pte Ltd 20 WEST PASIR PANJANG ROAD, #11-28 MAPLE TREE BUSINESS CITY mnt-by: MAINT-SG-NTTS last-modified: 2019-06-11T09:04:35Z source: APNIC rpki-ov-state: valid route: 116.51.36.0/24 origin: AS17645 descr: NTT Singapore Pte Ltd 20 West, Pasir Panjang Road #11-28, Mapletree Business City mnt-by: MAINT-SG-NTTS last-modified: 2021-06-01T07:10:31Z source: APNIC rpki-ov-state: valid route: 175.28.8.0/22 descr: NTT SINGAPORE - IP NETWORK (65000) origin: AS17645 member-of: RS-AS17645_IPBB_SGP00 notify: ip-eng [at] ntt.com.sg mnt-by: MAINT-AS17645 changed: ip-eng [at] ntt.com.sg 20140812 source: NTTCOM rpki-ov-state: valid route: 202.136.160.0/19 descr: NTT SINGAPORE - IP NETWORK (AS17645) origin: AS17645 mnt-by: MAINT-AS17645 notify: ip-eng [at] ntt.com.sg changed: ip-eng [at] ntt.com.sg 20061205 source: NTTCOM rpki-ov-state: valid route: 202.136.166.0/24 descr: NTT SINGAPORE - IP NETWORK (65000) origin: AS17645 member-of: RS-AS17645_IPBB_SGP00 notify: ip-eng [at] ntt.com.sg mnt-by: MAINT-AS17645 changed: raymondh [at] ntt.com.sg 20140716 source: NTTCOM rpki-ov-state: valid route: 202.136.166.0/24 origin: AS17645 descr: NTT Singapore Pte Ltd 20 WEST PASIR PANJANG ROAD, #11-28 MAPLE TREE BUSINESS CITY mnt-by: MAINT-SG-NTTS last-modified: 2021-01-13T08:47:11Z source: APNIC rpki-ov-state: valid route: 202.136.168.0/23 origin: AS17645 descr: NTT Singapore Pte Ltd 20 WEST PASIR PANJANG ROAD, #11-28 MAPLE TREE BUSINESS CITY mnt-by: MAINT-SG-NTTS last-modified: 2021-01-13T08:54:54Z source: APNIC rpki-ov-state: valid route: 202.136.168.0/23 descr: NTT SINGAPORE - IP NETWORK (AS17645) origin: AS17645 mnt-by: MAINT-AS17645 notify: raymondh [at] ntt.com.sg changed: ip-eng [at] ntt.com.sg 20061205 source: NTTCOM rpki-ov-state: valid route: 202.136.170.0/24 origin: AS17645 descr: NTT Singapore Pte Ltd 20 WEST PASIR PANJANG ROAD, #11-28 MAPLE TREE BUSINESS CITY mnt-by: MAINT-SG-NTTS last-modified: 2021-01-13T08:47:36Z source: APNIC rpki-ov-state: valid route: 202.136.170.0/24 descr: NTT SINGAPORE - IP NETWORK (65000) origin: AS17645 member-of: RS-AS17645_IPBB_SGP00 notify: ip-eng [at] ntt.com.sg mnt-by: MAINT-AS17645 changed: raymondh [at] ntt.com.sg 20140716 source: NTTCOM rpki-ov-state: valid route: 202.136.188.0/22 descr: NTT SINGAPORE - IP NETWORK (AS17645) origin: AS17645 mnt-by: MAINT-AS17645 notify: raymondh [at] ntt.com.sg changed: ip-eng [at] ntt.com.sg 20061205 source: NTTCOM rpki-ov-state: valid route: 202.136.188.0/22 origin: AS17645 descr: NTT Singapore Pte Ltd 20 WEST PASIR PANJANG ROAD, #11-28 MAPLE TREE BUSINESS CITY mnt-by: MAINT-SG-NTTS last-modified: 2021-01-13T08:56:05Z source: APNIC rpki-ov-state: valid route6: 2402:2c00::/32 descr: NTT SINGAPORE - IP NETWORK (AS17645) origin: AS17645 mnt-by: MAINT-AS17645 notify: ip-eng [at] ntt.com.sg changed: ip-eng [at] ntt.com.sg 20091007 source: NTTCOM rpki-ov-state: valid route6: 2402:2c00::/32 origin: AS17645 descr: NTT Singapore Pte Ltd 20 West, Pasir Panjang Road #11-28, Mapletree Business City mnt-by: MAINT-NTTS-HOSTMASTER last-modified: 2022-05-31T04:29:56Z source: APNIC rpki-ov-state: valid