These entries are queried from radb.net using whois, you can try my project getting these.
:AS135518 route: 103.73.216.0/23 origin: AS135518 descr: STS Holdings Limited Plot # 81, Block # E Bashundhara R/A mnt-by: MAINT-SHL-BD last-modified: 2023-03-16T05:45:00Z source: APNIC rpki-ov-state: valid route6: 2001:df2:e640::/48 origin: AS135518 descr: STS Holdings Limited Plot # 81, Block # E Bashundhara R/A mnt-by: MAINT-SHL-BD last-modified: 2023-11-09T03:29:42Z source: APNIC rpki-ov-state: valid