These entries are queried from radb.net using whois, you can try my project getting these.
:AS139793 route: 103.145.76.0/23 origin: AS139793 descr: Crystal Internet, 18/1-Road 4, Block - E, Polashpur, Donia, Kadamtoli, Dhaka, mnt-by: MAINT-CRYSTAL-BD last-modified: 2019-12-13T09:09:13Z source: APNIC rpki-ov-state: valid route: 103.145.76.0/24 origin: AS139793 descr: Crystal Internet 18/1-Road 4, Block - E, Polashpur, Donia, Kadamtoli, Dhaka, mnt-by: MAINT-CRYSTAL-BD last-modified: 2020-02-04T16:20:27Z source: APNIC rpki-ov-state: valid route: 103.145.77.0/24 origin: AS139793 descr: Md Shihab Uddin Crystal Internet, 18/1-Road 4, Block - E, Polashpur, Donia, Kadamtoli, Dhaka, mnt-by: MAINT-CRYSTAL-BD last-modified: 2019-11-23T05:19:10Z source: APNIC rpki-ov-state: valid