These entries are queried from radb.net using whois, you can try my project getting these.
:AS138552 route: 103.132.192.0/22 origin: AS138552 descr: RTB HOUSE PTE. LTD. 10 UBI CRESCENT #04-19, UBI TECHPARK mnt-by: MAINT-RTBHOUSE-SG last-modified: 2020-06-25T19:31:40Z source: APNIC rpki-ov-state: valid route: 103.132.192.0/23 origin: AS138552 descr: RTB HOUSE PTE. LTD. 10 UBI CRESCENT #04-19, UBI TECHPARK mnt-by: MAINT-RTBHOUSE-SG last-modified: 2020-06-25T19:31:41Z source: APNIC rpki-ov-state: valid route: 103.132.192.0/24 origin: AS138552 descr: RTB HOUSE PTE. LTD. 10 UBI CRESCENT #04-19, UBI TECHPARK mnt-by: MAINT-RTBHOUSE-SG last-modified: 2020-06-25T19:31:42Z source: APNIC rpki-ov-state: valid route: 103.132.193.0/24 origin: AS138552 descr: RTB HOUSE PTE. LTD. 10 UBI CRESCENT #04-19, UBI TECHPARK mnt-by: MAINT-RTBHOUSE-SG last-modified: 2020-06-25T19:31:43Z source: APNIC rpki-ov-state: valid route: 103.132.194.0/23 origin: AS138552 descr: RTB HOUSE PTE. LTD. 10 UBI CRESCENT #04-19, UBI TECHPARK mnt-by: MAINT-RTBHOUSE-SG last-modified: 2020-06-25T19:31:44Z source: APNIC rpki-ov-state: valid route: 103.132.194.0/24 origin: AS138552 descr: RTB HOUSE PTE. LTD. 10 UBI CRESCENT #04-19, UBI TECHPARK mnt-by: MAINT-RTBHOUSE-SG last-modified: 2020-06-25T19:31:45Z source: APNIC rpki-ov-state: valid route: 103.132.195.0/24 origin: AS138552 descr: RTB HOUSE PTE. LTD. 10 UBI CRESCENT #04-19, UBI TECHPARK mnt-by: MAINT-RTBHOUSE-SG last-modified: 2020-06-25T19:31:47Z source: APNIC rpki-ov-state: valid route6: 2404:3dc0:1::/48 origin: AS138552 descr: RTBHOUSE-SG mnt-by: MAINT-RTBHOUSE-SG last-modified: 2021-08-19T16:06:44Z source: APNIC rpki-ov-state: valid